Organization
Student Support Center Institute Professor
Title
Institute Professor
External link
OKAMURA TETSUJI
News & Media
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2014/04/26 19:25
Languages： Japanese
TV： NHK Eテレ 「すイエんサー」
Degree
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Doctor of Engineering ( Tokyo Institute of Technology )
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Master of Engineering ( Tokyo Institute of Technology )
Research Interests
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伝熱工学
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Heat transfer engineering
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Cryogenics
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低温工学
Education
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Tokyo Institute of Technology Graduate School, Division of Integrated Science and Engineering
1984.4 - 1987.3
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東京工業大学大学院 総合理工学研究科 エネルギー科学専攻 修士課程
1982.4 - 1984.3
Country： Japan
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Tokyo Institute of Technology School of Engineering
1978.4 - 1982.3
Country： Japan
Research History
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Institute of Science Tokyo Institute Professor
2025.4
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東京科学大学 教授
2024.10 - 2025.3
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東京工業大学 教授
2001.3 - 2024.9
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東京工業大学 助教授
1994 - 2001
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東京工業大学 助手
1987 - 1994
Professional Memberships
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日本伝熱学会
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低温工学会
Committee Memberships
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低温工学・超電導学会 執行理事
2018.6 - 2022.5
Committee type：Academic society
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低温工学・超電導学会 学会誌出版委員会委員長
2018.6 - 2022.5
Committee type：Academic society
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低温工学・超電導学会 理事
2014.6 - 2018.5
Committee type：Academic society
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International Institute of Refrigeration Vice chair
2008.1 - 2015.12
Committee type：Academic society
Papers
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Research of combined use of magnetic refrigeration technology for refrigerant circulation type high temperature superconducting coil cooling system Reviewed
Yodai Okazaki, Noguchi Masazumi, Takumi Takazawa, Tetsuji Okamura, Naoki Hirano
IEEE Transactions on Applied Superconductivity Vol. 32 ( No. 6 ) 2022.9
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Research on circulation cooling system for high temperature superconducting coils Reviewed
Masazumi Noguchi, Yodai Okazaki, Takumi Tkazawa, Tetsuji Okamura, Naoki Hirano
IEEE Transactions on Applied Superconductivity Vol. 32 ( No. 6 ) 2022.9
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Degradation of the performance of an epoxy-impregnated REBCO solenoid due to electromagnetic forces Reviewed
T. Matsuda, T. Okamura, M. Hamada, S. Matsumoto, T. Ueno, R. Piao, Y. Yanagisawa, H. Maeda
Cryogenics Vol. 90 2018.3
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Mn系合金階層充填磁気再生機の冷凍性能 Reviewed
谷口朋宏, 大久保達也, 岡村哲至, 裵相哲
日本冷凍空調学会論文集 Vol. 35 ( No. 1 ) 2018.1
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Screening current induced magnetic field in REBCO superconducting coil wound by using split wire having intermittent inner split Reviewed
Tetsuro Matsuda, Xinzhe Jin, Tetsuji Okamura
Cryogenics Vol. 86 2017.9
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階層構造化磁気再生器の材料構成の最適化に関する検討 Reviewed
川南剛, 大西孝之, 副島慧, 平野繁樹, 和田裕文, 岡村哲至, 裵相哲, 平野直樹
日本冷凍空調学会論文集 Vol. 34 ( No. 4 ) 2017.4
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複数のMn系磁性材料を用いた室温磁気冷凍機の作動温度範囲 Reviewed
岡村哲至, 有田照平, 大久保達也, 裵相哲, 平野直樹, 川南剛, 山下敬一朗, 大西孝之, 副島慧
日本冷凍空調学会論文集 Vol. 33 ( No. 3 ) 2016.9
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東京工業大学すずかけ台キャンパスでの低温伝熱研究
岡村哲至
低温工学 2016
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1 kW級室温磁気ヒートポンプの開発 Invited Reviewed
宮崎佳樹, 池田和也, 長谷川均, 平野直樹, 野口芳直, 岡村哲至, 裵相哲, 川南剛
低温工学 Vol. 50 ( No. 2 ) 2015.2
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Gd合金を磁気作業物質として用いた室温磁気冷凍機の性能向上 Reviewed
岡村哲至, 平野直樹
日本AEM学会誌 Vol. 21 ( No. 1 ) 2013.1
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Development of non-destructive evaluation system using an HTS-SQUID gradiometer for magnetized materials Reviewed
J. Kawano, A. Tsukamoto, S. Adachi, Y. Oshikubo, T. Hato, K. Tanabe, T. Okamura
Physics Procedia Vol. 27 2012
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低温「ふしぎ現象」小辞典
低温工学超電導学会編, 岡村哲至分担
2011.12
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Cold storage characteristics of mobile HTS magnet Reviewed
Katsutoshi Mizuno, Yoshiki Miyazaki, Ken Nagashima, Asumi Kawano, Tetsuji Okamura
CRYOGENICS 51 ( 6 ) 321 - 325 2011.6
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次世代冷凍システム技術の探訪 Reviewed
松岡 文雄, 遠藤 明, 大宮司 啓文, 琵琶 哲志, 稲田 孝明, 岡村哲至
冷凍 2010.9
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Overview of LHD superconducting magnet system and its 10-year operation Invited Reviewed
S. Imagawa, T. Mito, K. Takahata, S. Yamada, N. Yanagi, H. Chikaraishi, R. Maekawa, H. Tamura, A. Iwamoto, S. Hamaguchi, T. Obana, T. Okamura, Y. Shirai, T. Ise, T. Hamajima
Fusion Science and Technology Vol. 58 ( No. 1 ) 560 - 570 2010.7
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Helium subcooling system for LHD helical coils Reviewed
S. Hamaguchi, T. Okamura, S. Imagawa, T. Obana, N. Yanagi, T. Mito
Fusion Science and Technology Vol. 58 ( No. 1 ) 581 - 585 2010.7
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Hamaguchi, S., TETSUJI OKAMURA, Imagawa, S., Obana, T., Yanagi, N., Oba, K., Moriuchi, S., Sekiguchi, H., Mito, T.
IEEE Transactions on Applied Superconductivity 20 ( 3 ) 2051 - 2053 2010.6
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Increase of operating current of the LHD helical coils by upgrading the cooling system Reviewed
Imagawa, S., Obana, T., Hamaguchi, S., Yanagi, N., Mito, T., Moriuchi, S., Sekiguchi, H., Ooba, K., TETSUJI OKAMURA, Komori, A.
IEEE Transactions on Applied Superconductivity 20 ( 3 ) 438 - 441 2010.6
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Tesla Class Quasi-persistent Mode HTS Magnet Excited by Thermoelectric Element Reviewed
T. Tosaka, K. Koyanagi, K. Mizuno, T. Okamura, T. Kuriyama
IEEE Transactions on Applied Superconductivity Vol. 18 ( No. 2 ) 2008.6
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Results of the excitation test of the LHD helical coils cooled by subcooled helium Reviewed
S. Imagawa, T. Obana, S. Hamaguchi, N. Yanagi, T. Mito, S. Moriuchi, H. Sekiguchi, K. Ooba, T. Okamura, A. Komori, O. Motojima
IEEE Transactions on Applied Superconductivity 18 455 - 458 2008.6
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Performance of upgraded cooling system for LHD helical coils Reviewed
S. Hamaguchi, S. Imagawa, T. Obana, N. Yanagi, S. Moriuchi, H. Sekiguchi, K. Oba, T. Mito, O. Motojima, T. Okamura, T. Semba, S. Yoshinaga, H. Wakisaka
AIP Conference Proceedings 985 1724 - 1730 2008.4
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Characteristics of HeII Channels with Fountain Effect Reviewed
K. Suemasu, M. Takahashi, T. Okamura
Advances in Cryogenic Engineering 49 ( B ) 2004
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Construction of closed loop facility for CCMHD power generation Reviewed
Y. Okuno, T. Okamura, T. Murakami, K. Ohgaki, H. Takahashi, H. Yamasaki
34th AIAA Plasmadynamics and Lasers Conference 2003
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Experimental studies on closed cycle MHD power generation with Fuji-1 facility Reviewed
Yoshihiro Okuno, Shigeharu Kabashima, Tetsuji Okamura, Kunio Yoshikawa, Kiyoshi Tsuji, Tetsuya Suekane, Susumu Shioda, Hiroyuki Yamasaki, Yasuo Hasegawa
Proceedings of the Intersociety Energy Conversion Engineering Conference 2 848 - 853 1996
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HIGH-ENTHALPY EXTRACTION EXPERIMENTS WITH DISK MHD GENERATORS Reviewed
K TSUNODA, K KARIYA, T SUEKANE, H YAMASAKI, T OKAMURA, N HARADA, K YOSHIKAWA, S KABASHIMA, S SHIODA
JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING 38 ( 2 ) 265 - 272 1995.5
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ＭＨＤ発電機超電導磁石および超流動ヘリウム熱伝達に関する研究
岡村哲至
1987.2
Books
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Nonequilibrium Plasma MHD Power Generation with Fuji-1 Blow-down Facility
Kluwer academic publishers 1999
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Nonequilibrium Plasma MHD Power Generation with Fuji-1 Blow-down Facility
Kluwer academic publishers 1999
MISC
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S081014 Study on in-vehicle magnetic refrigerator : Verification of heat transport characteristics for a new system
TASAKI Yutaka, TAKAHASHI Hidekazu, MURAKAMI Ryo, OKAMURA Tetsuji, ITO Kouji, MATSUMOTO Hiroaki
Mechanical Engineering Congress, Japan 2013 "S081014 - 1"-"S081014-5" 2013.9
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Observation of liquid hydrogen jet on flashing and evaporation characteristics
K. Nakamichi, Y. Kihara, T. Okamura
CRYOGENICS 48 ( 1-2 ) 26 - 30 2008.1
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Achievement of high availability in long-term operation and upgrading plan of the LHD superconducting system
S. Imagawa, N. Yanagi, S. Hamaguchi, T. Mito, K. Takahata, H. Tamura, S. Yamada, R. Maekawa, A. Iwamoto, H. Chikaraishi, S. Moriuchi, H. Sekiguchi, K. Ooba, M. Shiotsu, T. Okamura, A. Komori, O. Motojima
NUCLEAR FUSION 47 ( 4 ) 353 - 360 2007.4
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Performance of a room-temperature rotary magnetic refrigerator
Tetsuji Okamura, Kazuhiko Yamada, Naoki Hirano, Shigeo Nagaya
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID 29 ( 8 ) 1327 - 1331 2006.12
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Experimental and numerical studies on thermal hydraulic characteristics of HeII through porous media
S. Hamaguchi, R. Maekawa, T. Okamura, B. Baudouy
ADVANCES IN CRYOGENIC ENGINEERING, VOLS 51A AND B 823 105 - + 2006
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Cryocooler-cooled high T-c superconducting magnet excited by a hybrid semiconductor-HTS thermoelectric element
M Ono, T Kuriyama, A Oguchi, T Okamura
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 15 ( 2 ) 1516 - 1519 2005.6
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Thermal Stability of Conduction-cooled HTS Coils : Thermal Stability Analysis
TASAKI Kenji, KURIYAMA Toru, INOTSUME Hidefumi, OKAMURA Tetsuji, HAYASHI Hidemi, IWAKUMA Masataka, FUNAKI Kazuo
Journal of the Cryogenic Society of Japan 40 ( 10 ) 412 - 419 2005
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Thermal Stability of Conduction-cooled HTS Coils : Thermal Runaway Evaluation Tests
TASAKI Kenji, INOTSUME Hidefumi, KURIYAMA Toru, OKAMURA Tetsuji, HAYASHI Hidemi, IWAKUMA Masataka, FUNAKI Kazuo
Journal of the Cryogenic Society of Japan 40 ( 10 ) 404 - 411 2005
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Clean and high efficiency MHD power generation
山岬裕之, 長谷川裕夫, 石川本雄, 稲葉次紀, 梅沢修一, 小笠原勝典, 粥川尚之, 渋谷正豊, 高野清南, 田中俊秀, 手塚勝, 原田信弘, 堀岡竜治, 益田光治, 荒井達雄, 金沢孝明, 伊藤仲二, 伊藤彰敏, 大竹一友, 小川孝之, 若山正夫, 長田勇, 山下紀久夫, 湯浅芳郎, 井上勲, 奥野喜裕, 岡村哲至, 椛島成治
電気学会技術報告 ( 1028 ) 2005
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Cryocooler-cooled high T-c superconducting magnet excited by thermoelectromotive force
M Ono, T Kuriyama, A Oguchi, J Ueda, T Okamura
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 14 ( 2 ) 1194 - 1197 2004.6
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Heat transport characteristics of HeII channels with the fountain effect
K Suemasu, M Takahashi, T Okamura
ADVANCES IN CRYOGENIC ENGINEERING, VOLS. 49A AND B 710 ( B ) 1007 - 1014 2004
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4.5 K cooling system for a cryogenically cooled probe for a 920 MHz NMR
H Yokota, T Okamura, Y Ohtani, T Kuriyama, M Takahashi, T Horiuchi, J Kikuchi, S Yokoyama, H Maeda
ADVANCES IN CRYOGENIC ENGINEERING, VOLS. 49A AND B 710 ( B ) 1826 - 1833 2004
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Numerical study on characteristics of a pre-cooling HeII heat exchanger
Y Ueno, T Okamura, A Sato
ADVANCES IN CRYOGENIC ENGINEERING, VOLS. 49A AND B 710 ( B ) 1039 - 1046 2004
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Heat transport characteristics of HeII channels with the fountain effect
K Suemasu, M Takahashi, T Okamura
ADVANCES IN CRYOGENIC ENGINEERING, VOLS. 49A AND B 710 ( B ) 1007 - 1014 2004
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4.5 K cooling system for a cryogenically cooled probe for a 920 MHz NMR
H Yokota, T Okamura, Y Ohtani, T Kuriyama, M Takahashi, T Horiuchi, J Kikuchi, S Yokoyama, H Maeda
ADVANCES IN CRYOGENIC ENGINEERING, VOLS. 49A AND B 710 ( B ) 1826 - 1833 2004
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Development of a high field superconducting magnet cooled by a 2 K cryocooler (2) - Characteristics of 2 K cryocooler
A Sato, S Nimori, M Maeda, H Nagai, F Matsumoto, M Takahashi, T Kuriyama, T Fujioka, T Ito, T Okamura
ADVANCES IN CRYOGENIC ENGINEERING, VOLS. 49A AND B 710 ( A ) 742 - 749 2004
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Numerical study on characteristics of a pre-cooling HeII heat exchanger
Y Ueno, T Okamura, A Sato
ADVANCES IN CRYOGENIC ENGINEERING, VOLS. 49A AND B 710 ( B ) 1039 - 1046 2004
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Thermal stability analysis of conduction-cooled HTS coil
T Obana, K Tasaki, T Kuriyama, T Okamura
CRYOGENICS 43 ( 10-11 ) 603 - 606 2003.10
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Thermal stability analysis of conduction-cooled HTS coil
T Obana, K Tasaki, T Kuriyama, T Okamura
CRYOGENICS 43 ( 10-11 ) 603 - 606 2003.10
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Basic study of high T-c superconducting magnet excited by thermoelectromotive force
M Ono, T Kuriyama, J Ueda, T Okamura
CRYOGENICS 43 ( 10-11 ) 571 - 574 2003.10
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Basic study of high T-c superconducting magnet excited by thermoelectromotive force
M Ono, T Kuriyama, J Ueda, T Okamura
CRYOGENICS 43 ( 10-11 ) 571 - 574 2003.10
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Magnetohydrodynamic power generation experiments with Fuji-1 blowdown facility
Y Okuno, T Okamura, T Suekane, H Yamasaki, S Kabashima, S Shioda
JOURNAL OF PROPULSION AND POWER 19 ( 5 ) 894 - 900 2003.9
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Heat transport characteristics of HeII channels with fountain effect
SUEMASU K., TAKAHASHI M., OKAMURA T.
68 65 - 65 2003.5
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Numerical study on characteristics of pre-cooling HeII heat exchanger
UENO Yohei, OKAMURA Tetsuji
68 59 - 59 2003.5
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Heat transfer and flown of HeII in narrow channels
T Suekane, M Sekiguchi, S Hirai, T Okamura
CRYOGENICS 43 ( 2 ) 125 - 131 2003.2
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Cryocooler-Cooled High Tc Superconducting Magnet Excited by Thermoelectromotive Force
M. Ono, T. Kuriyama, A. Oguchi, J. Ueda, T. Okamura
Proc. of 18th International Conference on Magnet Technology 61 2003
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Development of High Field Magnet Cooled by 2K Cryocooler
A. Sato, S. Nimori, M. Maeda, F. Matsumoto, H. Nagai, M, Takahashi T, Kuriyama T, Shimonosono T, Tsuchihashi T, Fujioka T, Ito T. Okamura
Proc. of 18th International Conference on Magnet Technology 61 2003
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Cryocooler-Cooled High Tc Superconducting Magnet Excited by Thermoelectromotive Force
M. Ono, T. Kuriyama, A. Oguchi, J. Ueda, T. Okamura
Proc. of 18th International Conference on Magnet Technology 61 2003
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Development of High Field Magnet Cooled by 2K Cryocooler
A. Sato, S. Nimori, M. Maeda, F. Matsumoto, H. Nagai, M, Takahashi T, Kuriyama T, Shimonosono T, Tsuchihashi T, Fujioka T, Ito T. Okamura
Proc. of 18th International Conference on Magnet Technology 61 2003
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Effect of load segmentation on the performance of a nonequilibrium disk MHD generator
T Murakami, T Okamura
IEEE TRANSACTIONS ON PLASMA SCIENCE 30 ( 5 ) 1999 - 2004 2002.10
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Effect of load segmentation on the performance of a nonequilibrium disk MHD generator
Tomoyuki Murakami, Tetsuji Okamura
IEEE Transactions on Plasma Science 30 ( 5 ) 1999 - 2004 2002.10
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Performance improvement of a two-stage GM cryocooler by use of Er(Ni0.075Co0.925)(2) magnetic regenerator material
L Trevisani, T Kuriyama, F Negrini, T Okamura, Y Ohtani, M Okamura, M Fabbri
CRYOGENICS 42 ( 10 ) 653 - 657 2002.10
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Effect of load-segmentation on the performance of a non-equilibrium disk MHD generator
T. Murakami, T. Okamura
IEEE Transactions on Plasma Science Vol. 30 ( No. 5 ) 1999 - 2004 2002.7
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Improvement on cooling performance in HeII channel using fountain effect
M Takahashi, A Senzaki, T Murakami, T Okamura
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 12 ( 1 ) 1359 - 1363 2002.3
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Development of 2K-GM/JT Cryocooler for Magnet Applications
A. Sato, S. Nimori, M. Maeda T, Numazawa M, Takahashi T, Kuriyama T, Fujioka T, Ito T. Okamura
Proc. of 12th International Cryocooler Conference 2002
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Experimental Study on Disk MHD Generator with Segmented Loading
T.Okamura, K.Okamoto, H.Morioka, T.Murakami
Proc. of 14th International Conference on MHD Electric Power Generation and High Temperature Technologies 2002
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Influence of Porous Spacer on Heat Transfer Characteristics in HeII Channels
M.Takahashi, T.Okamura
Proc. of 19th International Cryogenic Engineering Conference 2002
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Improvement on cooling performance in He II channel using fountain effect
M. Takahashi, A. Senzaki, T. Murakami, T. Okamura
IEEE Transactions on Applied Superconductivity 12 ( 1 ) 1359 - 1363 2002
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Development of 2K-GM/JT Cryocooler for Magnet Applications
A. Sato, S. Nimori, M. Maeda T, Numazawa M, Takahashi T, Kuriyama T, Fujioka T, Ito T. Okamura
Proc. of 12th International Cryocooler Conference 2002
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Experimental Study on Disk MHD Generator with Segmented Loading
T.Okamura, K.Okamoto, H.Morioka, T.Murakami
Proc. of 14th International Conference on MHD Electric Power Generation and High Temperature Technologies 2002
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Influence of Porous Spacer on Heat Transfer Characteristics in HeII Channels
M.Takahashi, T.Okamura
Proc. of 19th International Cryogenic Engineering Conference 2002
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Thermal Stability Analysis of Conduction-cooled HTS Coil
T. Obana, K, Tasaki T, Kuriyama T. Okamura
Proc. of 3rd Korea-Japan Joint Workshop for Applied Superconductivity and Cryogenics 2002
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Experiment on the heat conductivity function of He II under the atomospheric condition
TAKAHASHI Masato, SENZAKI Ayae, MURAKAMI Tomoyuki, OKAMURA Tetsuji
64 148 - 148 2001.5
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Performance of disk MHD generator with high magnetic flux density
T Okamura, Y Okuno
ENERGY CONVERSION AND MANAGEMENT 42 ( 7 ) 855 - 866 2001.5
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TAKAHASHI Masato, SUEKANE Tetsuya, OKAMURA Tetsuji
TEION KOGAKU 36 ( 12 ) 682 - 686 2001
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Improvement on Cooling Performance in HeII Channel Using Fountain Effect
M.Takahashi, A.Senzaki, T.Murakami, T.Okamura
Proc. of 17th International Conference on Magnet Technology 2001
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Reduction of Electrical Noise in Multi-point Temperature Measurement at HeII Temperature
Cryogenic Engineering 36 ( 12 ) 707 - 709 2001
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Chracteristics of Superconducting Liquid Level Sensor in Level Measurements of HeII
Cryogenic Engineering 36 ( 12 ) 705 - 706 2001
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Two-dimensional Heat Conduction Analysis of HeII, Using Implicit Method
Cryogenic Engineering 36 ( 12 ) 682 - 686 2001
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Numerical Stability Condition for Heat Transfer Simulation of Superfluid Helium
Cryogenic Engineering 36 ( 12 ) 675 - 681 2001
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Influence of Water Contamination on Performance of Nonequilibrium Disk MHD Generator
Trans. IEE of Japan 121 ( 8 ) 1005 - 1010 2001
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Performance of disk MHD generator with high magnetic flux density
T. Okamura, Y. Okuno
Energy Conversion and Management 42 ( 7 ) 855 - 866 2001
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Numerical Stability Condition for Heat Transfer Simulation of Superfluid Helium
SEKIGUCHI Motoyuki, SUEKANE Tetsuya, OKAMURA Tetsuji, HIRAI Syuichiro
TEION KOGAKU 36 ( 12 ) 675 - 681 2001
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非平衡ディスク形ＭＨＤ発電機の発電性能に与える水の影響
大柿久美子, 岡村哲至, 奥野喜裕, 末包哲也, 山岬裕之, 椛島成治
電気学会論文誌Ｂ 121 ( 8 ) 1005 - 1010 2001
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Development of Small 2K Cryocooler (I) - System Design and Experimental Results -
H.Nagai A.Sato, S.Nimori, K.Numasawa, M.Maeda, F.Matsumoto, M.Takahashi, K.Ohsemoti T.Kuriyama, T.Fujioka, K.Kitagawa, T.Okamura
Proc. of the CEC/ICMC 2001
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Development of Small 2K Cryocooler (II) - High Efficient and Low Pressure Drop Heat Exchanger -
F.Matsumoto, A.Sato, S.Nimori, K.Numasawa, M.Maeda, H.Nagai, M.Takahashi, K.Ohsemoti T.Kuriyama, T.Fujioka, K.Kitagawa, T.Okamura
Proc. of the CEC/ICMC 2001
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Development of Small 2K Cryocooler (I) - System Design and Experimental Results -
H.Nagai A.Sato, S.Nimori, K.Numasawa, M.Maeda, F.Matsumoto, M.Takahashi, K.Ohsemoti T.Kuriyama, T.Fujioka, K.Kitagawa, T.Okamura
Proc. of the CEC/ICMC 2001
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Development of Small 2K Cryocooler (II) - High Efficient and Low Pressure Drop Heat Exchanger -
F.Matsumoto, A.Sato, S.Nimori, K.Numasawa, M.Maeda, H.Nagai, M.Takahashi, K.Ohsemoti T.Kuriyama, T.Fujioka, K.Kitagawa, T.Okamura
Proc. of the CEC/ICMC 2001
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Improvement on Cooling Performance in HeII Channel Using Fountain Effect
M.Takahashi, A.Senzaki, T.Murakami, T.Okamura
Proc. of 17th International Conference on Magnet Technology 2001
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Reduction of Electrical Noise in Multi-point Temperature Measurement at He II Temperature
TAKAHASHI Masato, OKAMURA Tetsuji
TEION KOGAKU 36 ( 12 ) 707 - 709 2001
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Characteristics of Superconducting Liquid Level Sensor in Level Measurements of He II
OKAMURA Tetsuji, TAKAHASHI Masahiko
TEION KOGAKU 36 ( 12 ) 705 - 706 2001
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Configuration effect of superfluid helium channel on the lambda-transition heat flux
T Okamura, M Takahashi, D Muramatsu, H Kobayashi
CRYOGENICS 40 ( 6 ) 403 - 406 2000.6
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Configuration effect of superfluid helium channel on the lambda-transition heat flux
T Okamura, M Takahashi, D Muramatsu, H Kobayashi
CRYOGENICS 40 ( 6 ) 403 - 406 2000.6
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ブローダウン方式ＭＨＤ発電機壁面のシード付着軽減による発電性能の改善
寺田竜啓, 前田哲彦, 末包哲也, 奥野喜裕, 岡村哲至, 山岬裕之, 椛島成治
電気学会論文誌Ｂ 120 ( 7 ) 1010 - 1015 2000
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One-dimensional Heat Transfer Analysis of He II regarding the Temperature Rise at the Channel End
TAKAHASHI Masato, MURAMATSU Daisuke, OKAMURA Tetsuji
Cryogenic engineering 35 ( 8 ) 403 - 409 2000
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Effect of superfluid helium channel configuration on the heat transport characteristics
T Okamura, M Takahashi, D Muramatsu
SIXTH CRYOGENICS 2000, PROCEEDINGS ( 6 ) 38 - 41 2000
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Improvement in Performance of MHD Generator in Blow-down Facility by Suppressing Seed Deposition on Walls
Trans. IEE of Japan 120 ( 7 ) 1010 - 1015 2000
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Heat Transport Characteristics of Superfluid Helium in Channels Segmented by a Spacer Having Holes
Tetsuji OKAMURA, Kengo AOKI, Masato TAKAHASHI
Cryogenic Engineering 35 ( 3 ) 143 - 147 2000
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YAMADA Yutaka, HATTORI Tomoyuki, MAEDA Hideaki, KAWANO Jouji, OKAMURA Tetsuji
Cryogenic Engineering 35 ( 5 ) 239 - 245 2000
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Heat Transport Characteristics of Superfluid Helium in Channels Segmented by a Spacer Having Holes
OKAMURA Tetsuji, AOKI Kengo, TAKAHASHI Masato
Cryogenic engineering 35 ( 3 ) 143 - 147 2000
-
YAMADA Yutaka, HATTORI Tomoyuki, MAEDA Hideaki, KAWANO Jouji, OKAMURA Tetsuji
Cryogenic engineering 35 ( 5 ) 239 - 245 2000
-
High Power Generation Experiment with Fuji-1 MHD Blow-down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, K.Ohgaki, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa
AIAA 31st Plasmadynamics and Lasers Conf. 2000
-
Effect of superfluid helium channel configuration on the heat transport characteristics
T Okamura, M Takahashi, D Muramatsu
SIXTH CRYOGENICS 2000, PROCEEDINGS ( 6 ) 38 - 41 2000
-
One-dimensional Heat Transfer Analysis of HeⅡ regarding the Temperature Rise at the Channel End
Masato TAKAHASHI, Daisuke MURAMATSU, Tetsuji OKAMURA
Cryogenic Engineering 35 ( 8 ) 403 - 409 2000
-
High Power Generation Experiment with Fuji-1 MHD Blow-down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, K.Ohgaki, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa
AIAA 31st Plasmadynamics and Lasers Conf. 2000
-
High enthalpy extraction experiments with Fuji-1 MHD blow-down facility
Y Okuno, T Okamura, K Yoshikawa, T Suekane, K Tsuji, M Okubo, T Maeda, T Murakami, H Yamasaki, S Kabashima, S Shioda, Y Hasegawa
ENERGY CONVERSION AND MANAGEMENT 40 ( 11 ) 1177 - 1190 1999.7
-
Nonequilibrium plasma mhd power generation with Fuji-1 blow-down facility
Y Okuno, T Okamura, K Yoshikawa, T Suekane, K Tsuji, T Maeda, T Murakami, S Kabashima, H Yamasaki, S Shioda, Y Hasegawa
TRANSFER PHENOMENA IN MAGNETOHYDRODYNAMIC AND ELECTROCONDUCTING FLOWS 51 409 - 420 1999
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Analysis of a high efficiency 4K GM refrigerator operating at a lower pressure ratio
T Usami, T Okamura, S Kabashima, Y Ohtani, H Hatakeyama, H Nakagome
CRYOCOOLERS 10 10 587 - 592 1999
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Power Generation Experiments with CCMHD Fuji-1 Blow-down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, M.Okubo, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa
AIAA 30th Plasmadynamics and Lasers Conf. 1999
-
Power Generation Experiments with Fuji-1 MHD Blow-down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, M.Okubo, T.Maeda, K.Ohgaki, H.Takahashi, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa
Proc. of International Conference on MHD Electric Power Generation and High Temperature Technologies 223 - 232 1999
-
Effect of Channel Configuration of Disk MHD Generators with He/Cs on Adiabatic Efficiency
T.Okamura, T.Suekane, T.Oba, K.Miyazawa, H.Sano
Proc. of International Conference on MHD Electric Power Generation and High Temperature Technologies 325 - 330 1999
-
Power Generation Experiments with CCMHD Fuji-1 Blow-down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, M.Okubo, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa
AIAA 30th Plasmadynamics and Lasers Conf. 1999
-
Power Generation Experiments with Fuji-1 MHD Blow-down Facility
OKUNO Y.
Proc. of Int. Conf. on MHD Power Generation and High Temperature Technologies 1999 223 - 232 1999
-
Effect of Channel Configuration of Disk MHD Generators with He/Cs on Adiabatic Efficiency
T.Okamura, T.Suekane, T.Oba, K.Miyazawa, H.Sano
Proc. of International Conference on MHD Electric Power Generation and High Temperature Technologies 325 - 330 1999
-
Analysis of a high efficiency 4K GM refrigerator operating at a lower pressure ratio
T Usami, T Okamura, S Kabashima, Y Ohtani, H Hatakeyama, H Nakagome
CRYOCOOLERS 10 10 587 - 592 1999
-
Measurement of Faraday current in a disk MHD generator
H Nakamura, T Okamura
ELECTRICAL ENGINEERING IN JAPAN 125 ( 4 ) 19 - 25 1998.12
-
Improved cooling performance of HeII channels separated by a porous spacer
T Okamura, S Hamaguchi, T Okada, S Kabashima
CRYOGENICS 38 ( 10 ) 967 - 970 1998.10
-
Improved cooling performance of HeII channels separated by a porous spacer
T Okamura, S Hamaguchi, T Okada, S Kabashima
CRYOGENICS 38 ( 10 ) 967 - 970 1998.10
-
Experimental studies on isentropic efficiency of a nonequilibrium MHD disk generator
H Nakamura, T Okamura, S Shioda
IEEE TRANSACTIONS ON PLASMA SCIENCE 26 ( 1 ) 69 - 78 1998.2
-
高効率ＣＣＭＨＤ単独発電システムの提案
奥野喜裕, 吉川邦夫, 岡村哲至, 山岬裕之, 椛島成治, 塩田進
電気学会論文誌Ｂ 118 ( 12 ) 1457 - 1462 1998
-
Proposal of a Highly Efficient CCMHD Single Power Generation System
OKUNO Y.
The Transactions of The Institute of Electrical Engineers of Japan 118 ( 12 ) 1457 - 1462 1998
-
Heat Transfer Characteristics in an HeII Channel Including a Copper Wall
Shinji HAMAGUCHI, Tetsuji OKAMURA, Shigeharu KABASHIMA
Cryogenic Engineering 33 ( 8 ) 561 - 565 1998
-
Heat Transfer Characteristics in an He II Channel, Including a Copper Wall.
HAMAGUCHI Shinji, OKAMURA Tetsuji, KABASHIMA Shigeharu
TEION KOGAKU 33 ( 8 ) 561 - 565 1998
-
Experimental Studies on Total Pressure Loss in a Disk MHD Generator
T.Okamura, K.Hirokawa, T.Oba, T.Suekane
Proc. of The 1998 International Symposium on Advanced Energy Technology 361 - 368 1998
-
Recent Power Generation Experiments with Fuji-1 CCMHD Blow-down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, M.Okubo, H.Takahashi, T.Murakami, T.Maeda, S.Kabashima, H.Yamasaki, S.Shioda, Y.Hasegawa, S.Ikeda, H.Mukai
Proc. of The 1998 International Symposium on Advanced Energy Technology 277 - 284 1998
-
Experimental Studies on Electrical Characteristics in Fuji-1 Disk MHD Generator
T.Maeda, T.Suekane, Y.Okuno, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Kabashima
Proc. of The 1998 International Symposium on Advanced Energy Technology 285 - 292 1998
-
High Enthalpy Extraction Experiments with CCMHD Fuji-1 Blow-down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, M.Okubo, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa
AIAA 29th Plasmadynamics and Lasers Conf. 1998
-
Heat transport characteristics in Hell channels separated by a porous spacer
T Okamura, S Hamaguchi, T Okada, S Kabashima
INTERNATIONAL CRYOGENIC ENGINEERING CONFERENCE 1998 679 - 682 1998
-
Measurement of Faraday Current in a Disk MHD Generator
H.Nakamura, T.Okamura
Electrical Engineering in Japan 125 ( 4 ) 19 - 25 1998
-
Electric Field and Current Characteristics of Bi2Sr2CaCu2O8+δ/Ag Superconducting Tapes during Flux Flow State
Gen NISHIJIMA, Takashi OGURA, Tetsuji OKAMURA, Shigeharu KABASHIMA, Eriko S. YONEDA, Shunji NOMURA, Hideki NAKAGOME
Cryogenic Engineering 33 ( 6 ) 382 - 389 1998
-
NISHIJIMA Gen, OGURA Takashi, OKAMURA Tetsuji, KABASHIMA Shigeharu, YONEDA Eriko S., NOMURA Shunji, NAKAGOME Hideki
Cryogenic engineering 33 ( 6 ) 382 - 389 1998
-
High Enthalpy Extraction Experiments with Blow -Down MHD Power Generation Facility Fuji-1
MAEDA Tetsuhiko, OKUNO Yoshihiro, OKAMURA Tetsuji, YOSHIKAWA Kunio, YAMASAKI Hiroyuki, KABASHIMA Shigeharu
10 189 - 194 1998
-
Heat transport characteristics in Hell channels separated by a porous spacer
T Okamura, S Hamaguchi, T Okada, S Kabashima
INTERNATIONAL CRYOGENIC ENGINEERING CONFERENCE 1998 679 - 682 1998
-
Experimental Studies on Total Pressure Loss in a Disk MHD Generator
OKAMURA T.
The 1998 International Symposium on Advanced Energy Technology Proceedings 361 - 368 1998
-
Recent Power Generation Experiments with Fuji-1 CCMHD Blow-down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, M.Okubo, H.Takahashi, T.Murakami, T.Maeda, S.Kabashima, H.Yamasaki, S.Shioda, Y.Hasegawa, S.Ikeda, H.Mukai
Proc. of The 1998 International Symposium on Advanced Energy Technology 277 - 284 1998
-
Experimental Studies on Electrical Characteristics in Fuji-1 Disk MHD Generator
T.Maeda, T.Suekane, Y.Okuno, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Kabashima
Proc. of The 1998 International Symposium on Advanced Energy Technology 285 - 292 1998
-
E-I Characteristics in Flux Flow State for Bi2212/Ag Superconducting Tapes
NISHIJIMA Gen, OGURA Takashi, OKAMURA Tetsuji, KABASHIMA Shigeharu, YONEDA Eriko S., NOMURA Shunji, NAKAGOME Hideki
57 8 - 8 1997.11
-
Magnetic stability of AC superconducting wire in self field
G Nishijima, T Okamura, S Kabashima, T Kurusu, T Yazawa, S Nomura, H Nakagome, H Maeda
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 7 ( 2 ) 778 - 781 1997.6
-
自己磁界下における交流用超電導線のクエンチ特性
西島 元, 岡村 哲至, 椛島 成治, 岡田 秀彦, 竹澤 伸久, 野村 俊自, 中込 秀樹
低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 56 271 - 271 1997.5
-
Nonequilibrium MHD power generation experiments with a shock-tube facility
NAKAMURA H.
AIAA paper, 28th Plasmadynamrcs and Lasers Conference 1997
-
Nonequilibrium Plasma MHD Power Generation with FUJI-1 Blow-Down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, T.Maeda, T.Murakami, S.Kabashima, H.Yamasaki, S.Shioda, Y.Hasegawa
3rd International Conferance on Transfer Phenomena in Magnetohydrodynamic & Electroconducting Flows 1997
-
Heat Transfer in HeⅡ Flow Loop Driven by Fountain Effect Pump
T.Okamura, S.Matsuo, S.Kabashima
Proc. of 15th International Conference on Magnet Technology 1250 - 1253 1997
-
Heat Transfer from Copper Wall to HeⅡ Channel
S. Hamaguchi, T. Okada, T.Okamura, S.Kabashima
Proc. of 15th International Conference on Magnet Technology 1246 - 1249 1997
-
Flux Flow State in Bi2Sr2CaCu2O8+δ Films on Ag Tapes
G. Nishijima T.Okamura, S.Kabashima E, S. Yoneda, S. Nomura, H. Nakagome
Proc. of 15th International Conference on Magnet Technology 1067 - 1070 1997
-
Electromagnetic Anisotropy in Bi_2Sr_2CaCu_2O_<8+δ>/Ag Tape
YAMADA Hiroyuki, OKAMURA Tetsushi, KABASHIMA Shigeharu, TASAKI Kenji, NOMURA Shunji, NAKAGOME Hideki
TEION KOGAKU 32 ( 3 ) 110 - 115 1997
-
Experimental Studies on Joule Dissipation in a Nonequilibrium MHD Disk Generator
H.Nakamura, T.Okamura, S.Shioda
The Transactions of The Institute of Electrical Engineers of Japan 117 ( 1 ) 107 - 113 1997
-
ディスク形ＣＣＭＨＤ発電機に及ぼす混在ダスト粒子の影響に関する数値解析
佐々木要, 奥野喜裕, 岡村哲至, 椛島成治
電気学会論文誌Ｂ 117 ( 5 ) 743 - 748 1997
-
ディスク形ＭＨＤ発電機内のファラデー電流計測
中村元, 岡村哲至
電気学会論文誌Ｂ 117 ( 11 ) 1475 - 1480 1997
-
Isentropic Efficiency of Shock-Tube Driven Disk MHD Generator
H.Nakamura, K.Hirokawa, H.Funai, K.Takayama, T.Okamura, S.Shioda
Proc. of 34th Symposium on Engineering Aspects of MHD 5.3.1-5.3.10 1997
-
Flux Flow State in Bi2Sr2CaCu2O8+δ Films on Ag Tapes
G. Nishijima T.Okamura, S.Kabashima E, S. Yoneda, S. Nomura, H. Nakagome
Proc. of 15th International Conference on Magnet Technology 1067 - 1070 1997
-
Measurement of Faraday Current in a Disk MHD Generator
The Transactions of The Institute of Electrical Engineers of Japan 117 ( 11 ) 1475 - 1480 1997
-
Heat Transfer in a Closed-Loop Fuuntain Effect Pump
Naoko YAMAGUCHI, Shintaro MATSUO, Tetsuji OKAMURA, Shigeharu KABASHIMA
Cryogenic Engineering 32 ( 5 ) 230 - 234 1997
-
Discharge Structure and Performance in Disk CCMHD Generator with Water Vapor
SASAKI K.
The Transactions of The Institute of Electrical Engineers of Japan 117 ( 2 ) 246 - 251 1997
-
Numerical Simulation on Influence of Dust Particles in Disk CCMHD Generator
The Transactions of The Institute of Electrical Engineers of Japan 117 ( 5 ) 743 - 748 1997
-
Electromagnetic Anisotropy in Bi2Sr2CaCuO8+δ/Ag Tape
Cruogenic Engineering 32 ( 3 ) 246 - 251 1997
-
Experimental Studies on Joule Dissipation in a Nonequilibrium MHD Disk Generator
H.Nakamura, T.Okamura, S.Shioda
The Transactions of The Institute of Electrical Engineers of Japan 117 ( 1 ) 107 - 113 1997
-
Heat Transfer in a Closed-Loop Fountain Effect Pump
YAMAGUCHI Naoko, MATSUO Shintaro, OKAMURA Tetsuji, KABASHIMA Shigeharu
Cryogenic engineering 32 ( 5 ) 230 - 234 1997
-
Discharge Structure and Performance in Disk CCMHD Generator with Water Vapor
SASAKI Kaname, OKUNO Yoshihiro, OKAMURA Tetsuji, KABASHIMA Shigeharu
The Transactions of the Institute of Electrical Engineers of Japan. B A Publication of Power and Energy Society 117 ( 2 ) 246 - 251 1997
-
Isentropic Efficiency of Shock-Tube Driven Disk MHD Generator
H.Nakamura, K.Hirokawa, H.Funai, K.Takayama, T.Okamura, S.Shioda
Proc. of 34th Symposium on Engineering Aspects of MHD 5.3.1-5.3.10 1997
-
Nonequilibrium MHD Power Generation Experiments with a Shock-Tube Facility
H.Nakamura, K.Hirokawa, T.Okamura, S.Shioda
28th AIAA Plasmadynamics and Lasers Conf. 1997
-
Nonequilibrium Plasma MHD Power Generation with FUJI-1 Blow-Down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, T.Maeda, T.Murakami, S.Kabashima, H.Yamasaki, S.Shioda, Y.Hasegawa
3rd International Conferance on Transfer Phenomena in Magnetohydrodynamic & Electroconducting Flows 1997
-
Heat Transfer in HeⅡ Flow Loop Driven by Fountain Effect Pump
T.Okamura, S.Matsuo, S.Kabashima
Proc. of 15th International Conference on Magnet Technology 1250 - 1253 1997
-
Heat Transfer from Copper Wall to HeⅡ Channel
S. Hamaguchi, T. Okada, T.Okamura, S.Kabashima
Proc. of 15th International Conference on Magnet Technology 1246 - 1249 1997
-
自己磁界下における交流用超電導線の安定性
西島 元, 岡村 哲至, 椛島 成治, 岡田 秀彦, 来栖 努, 矢沢 孝, 野村 俊自, 中込 秀樹
低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 55 240 - 240 1996.11
-
Performance of fountain effect pumps with different HeII flow loops
T Okamura, M Matsuda, S Kabashima
IEEE TRANSACTIONS ON MAGNETICS 32 ( 4 ) 2772 - 2775 1996.7
-
Performance of fountain effect pumps with different HeII flow loops
T Okamura, M Matsuda, S Kabashima
IEEE TRANSACTIONS ON MAGNETICS 32 ( 4 ) 2772 - 2775 1996.7
-
Measurements of properties concerning isentropic efficiency in a nonequilibrium MHD disk generator
H Nakamura, T Okamura, S Shioda
IEEE TRANSACTIONS ON PLASMA SCIENCE 24 ( 3 ) 1125 - 1132 1996.6
-
Performance of a closed type fountain effect pump
T Okamura, M Matsuda, S Kabashima
CRYOGENICS 36 ( 3 ) 171 - 174 1996.3
-
Experimental studies on closed cycle MHD power generation with Fuji-1 facility
Y Okuno, S Kabashima, T Okamura, K Yoshikawa, K Tsuji, T Suekane, S Shioda, H Yamasaki, Y Hasegawa
IECEC 96 - PROCEEDINGS OF THE 31ST INTERSOCIETY ENERGY CONVERSION ENGINEERING CONFERENCE, VOLS 1-4 848 - 853 1996
-
Two-Demensional Heat Transport in Pressurized HeII Channel
HAMAGUCHI Shinji, SAKUMA Wataru, OKAMURA Tetsuji, KABASHIMA Shigeharu
Cryogenic engineering 31 ( 7 ) 373 - 378 1996
-
Two Dimensional Heat Transport in HeII Channel Including a Copper Wall
T.Okamura, S.Hamaguchi, S.Sakuma, T.Suekane, S.Kabashima
Proc. of 16th ICEC/ICMC 539 - 542 1996
-
Two Dimensional Heat Transport in HeII Channel Including a Copper Wall
T.Okamura, S.Hamaguchi, S.Sakuma, T.Suekane, S.Kabashima
Proc. of 16th ICEC/ICMC 539 - 542 1996
-
Experimental studies on closed cycle MHD power generation with Fuji-1 facility
Y Okuno, S Kabashima, T Okamura, K Yoshikawa, K Tsuji, T Suekane, S Shioda, H Yamasaki, Y Hasegawa
IECEC 96 - PROCEEDINGS OF THE 31ST INTERSOCIETY ENERGY CONVERSION ENGINEERING CONFERENCE, VOLS 1-4 848 - 853 1996
-
Magnetic Stability of AC Superconducting Wire in Self Field
G.Nishijima T.Okamura, S.Kabashima, T.Kurusu, T.Yazawa, S.Nomura, H.Nakagome, H.Maeda
Applied Superconductivity Conference 1996
-
Estimation of Joule Dissipation in a Nonequilibrium Disk Generator
H.Nakamura, M.Matsuda, T.Okamura, S.Shioda
Proc. of 12th International Conference on MHD Electrical Power Generation 134 - 141 1996
-
Closed Cycle MHD Power Generation Experiments with FUJI-1 Blow-Down Facility
OKUNO Y.
Proc. of 12th International Conference on MHD Power Generation 155 - 164 1996
-
FUJI-1 Superconducting Magnet
T.Okamura, H.Takahashi, S.Kabashima, S.Shioda
Proc. of 12th International Conference on MHD Electrical Power Generation 358 - 363 1996
-
Sausaging Mechanism and Effect on Critical Current Density in Bi2223/Ag Superconducting Tape
K.Yamamoto, H.Onoda, Y.Yamada, T.Koizumi, T.Hasegawa, M.Takada, T.Okamura, S.Kabashima
9th International Symposium on Superconductivity (ISS96) 1996
-
Performance of Fountain Effect Pumps with Different Hell Flow Loops
T. Okamura, M. Matsuda, S. Kabashima
IEEE Transactions on Magnetics 32 ( 4 ) 2772 - 2775 1996
-
Magnetic Stability of AC Superconducting Wire in Self Field
G.Nishijima T.Okamura, S.Kabashima, T.Kurusu, T.Yazawa, S.Nomura, H.Nakagome, H.Maeda
Applied Superconductivity Conference 1996
-
Estimation of Joule Dissipation in a Nonequilibrium Disk Generator
H.Nakamura, M.Matsuda, T.Okamura, S.Shioda
Proc. of 12th International Conference on MHD Electrical Power Generation 134 - 141 1996
-
Closed Cycle MHD Power Generation Experiments with FUJI-1 Blow-Down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Tsuji, K.Ohgaki, S.Kabashima, H.Yamasaki, S.Shioda, Y.Hasegawa, K.Matsutani, M.Tezuka, S.Ikeda, H.Mukai
Proc. of 12th International Conference on MHD Electrical Power Generation 155 - 164 1996
-
FUJI-1 Superconducting Magnet
T.Okamura, H.Takahashi, S.Kabashima, S.Shioda
Proc. of 12th International Conference on MHD Electrical Power Generation 358 - 363 1996
-
Sausaging Mechanism and Effect on Critical Current Density in Bi2223/Ag Superconducting Tape
K.Yamamoto, H.Onoda, Y.Yamada, T.Koizumi, T.Hasegawa, M.Takada, T.Okamura, S.Kabashima
9th International Symposium on Superconductivity (ISS96) 1996
-
Two-Dimensional Heat Transport in Pressurized HeII Channel
Shinji HAMAGUCHI, Wataru SAKUMA, Tetsuji OKAMURA, Shigeharu KABASHIMA
Cryoqenic Engineering 31 ( 7 ) 373 - 378 1996
-
Fuji-1装置を用いた最近の実験結果
前田 哲彦, 奥田 和孝, 関 孝和, 塚本 康平, 村上 朝之, 末包 哲也, 辻 潔, 大柿 久美子, 岡村 哲至, 奥野 喜裕, 吉川 邦夫, 椛島 成治, 塩田 進, 山岬 裕之, 長谷川 裕夫, 原田 信弘, 松谷 欣也, 手塚 勝, 堂園 義一, 池田 三郎
電気学会研究会資料. ESC, 新・省エネルギー研究会 1995 ( 1 ) 1 - 10 1995.9
-
強いMHD相互作用下での放射状超音速流れの計測
関 孝和, 奥田 和孝, 末包 哲也, 岡村 哲至, 奥野 喜裕, 吉川 邦夫, 椛島 成治, 塩田 進, 山岬 裕之
電気学会研究会資料. ESC, 新・省エネルギー研究会 1995 ( 1 ) 11 - 20 1995.9
-
高断熱効率MHD発電実験
松田 道治, 中村 元, 岡村 哲至, 塩田 進
電気学会研究会資料. ESC, 新・省エネルギー研究会 1995 ( 1 ) 71 - 80 1995.9
-
非平衡ディスク型MHD発電機内のプラズマ挙動の考察
中村 元, 岡村 哲至, 奥野 喜裕, 塩田 進
電気学会研究会資料. ESC, 新・省エネルギー研究会 1995 ( 1 ) 81 - 90 1995.9
-
IMPROVEMENT OF ENTHALPY EXTRACTION OVER 30-PERCENT USING A DISK MHD GENERATOR WITH INLET SWIRL
N HARADA, N KIZUKA, T OKAMURA, H YAMASAKI, S SHIODA
ENERGY CONVERSION AND MANAGEMENT 36 ( 5 ) 355 - 364 1995.5
-
Measurements of Plasma and Fluid Properties in Closed Cycle Disk Generator
H.Nakamura, A.Noma, M.Matsuda, T.Okamura, H.Yamasaki, S.Shioda
Proc. of 33rd Symposium on Engineering Aspects of MHD IV.2-1 - IV.2-8 1995
-
High-Enthalpy Extraction Experiments with Disk MHD Generators
TSUNODA Kazumi, KARIYA Kohgi, SUEKANE Tetsuya, YAMASAKI Hiroyuki, OKAMURA Tetsuji, HARADA Nobuhiro, YOSHIKAWA Kunio, KABASHIMA Shigeharu, SHIODA Susumu
JSME international journal. Ser. B, Fluids and thermal engineering 38 ( 2 ) 265 - 272 1995
-
Recent Activities on CCMHD Power Generation Studies with FUJI-1 Blow-Down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Ohgaki, K.Tsuji, S.Kabashima, S.Shioda, H.Yamasaki, Y.Hasagawa, N.Harada, K.Matsutani, M.Tezuka, Y.Dozono, S.Ikeda
Proc. of 33rd Symposium on Engineering Aspects of MHD II.1-1 - II.1-10 1995
-
Characteristics of a Disk MHD Generator with Inlet Swirl
Nob.Harada, T.Okamura, K.Nakamichi, A.Noma
Proc. of 33rd Symposium on Engineering Aspects of MHD III.2-1 - III.2-9 1995
-
Measurements of Plasma and Fluid Properties in Closed Cycle Disk Generator
H.Nakamura, A.Noma, M.Matsuda, T.Okamura, H.Yamasaki, S.Shioda
Proc. of 33rd Symposium on Engineering Aspects of MHD IV.2-1 - IV.2-8 1995
-
Performance of Fountain Effect Pump with Different HeII Flow Loop
T.Okamura, M.Matsuda, S.Kabashima
Proc. of 14th International Conference on Magnet Technology 1995
-
High-Enthalpy Extraction Experiments with Disk MHD Generators
K.Tsunoda, K.Kariya, T.Suekane, H.Yamasaki, T.Okamura, N.Harada, K.Yoshikawa, S.Kabashima, S.Shioda
JSME International Journal (Series B) 38 ( 2 ) 265 - 272 1995
-
Recent Activities on CCMHD Power Generation Studies with FUJI-1 Blow-Down Facility
Y.Okuno, T.Okamura, K.Yoshikawa, T.Suekane, K.Ohgaki, K.Tsuji, S.Kabashima, S.Shioda, H.Yamasaki, Y.Hasagawa, N.Harada, K.Matsutani, M.Tezuka, Y.Dozono, S.Ikeda
Proc. of 33rd Symposium on Engineering Aspects of MHD II.1-1 - II.1-10 1995
-
Characteristics of a Disk MHD Generator with Inlet Swirl
Nob.Harada, T.Okamura, K.Nakamichi, A.Noma
Proc. of 33rd Symposium on Engineering Aspects of MHD III.2-1 - III.2-9 1995
-
HEAT-TRANSPORT IN HE-II CHANNEL WITH PHASE-TRANSITION
T OKAMURA, T SUZUKI, N SEKI, S KABASHIMA
CRYOGENICS 34 ( 3 ) 187 - 193 1994.3
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Performance of Closed Type Fountain Effect Pump
T.Okamura, M.Matsuda, S.Kabashima
International Symposium on Safety of Superconductors and Related Heat Transfer at Low Temperatures 1D1:1-5 1994
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Performance of Closed Type Fountain Effect Pump
T.Okamura, M.Matsuda, S.Kabashima
International Symposium on Safety of Superconductors and Related Heat Transfer at Low Temperatures 1D1:1-5 1994
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Two Dimensional Heat Transfer in HeII Channels
S.Kabashima, S.Hamaguchi, N.Seki, T.Suzuki, T.Okamura
International Symposium on Safety of Superconductors and Related Heat Transfer at Low Temperatures 1C2:1-7 1994
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Gnerator Performance of a Disk CCMHD Generator with Inlet Swirl
The Transactions of The Institute of Electrical Engineers of Japan 114 ( 6 ) 626 - 632 1994
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2-DIMENSIONAL NUMERICAL-SIMULATION ON HE-II HEAT-TRANSPORT
T OKAMURA, S HAMAGUCHI, S KABASHIMA
CRYOGENICS 34 ( ICEC Sup. ) 305 - 308 1994
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Generator Performance of a Disk CCMHD Generator with Inlet Swirl
The Transactions of The Institute of Electrical Engineers of Japan 114 ( 6 ) 626 - 632 1994
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Two Dimensional Heat Transfer in HeII Channels
S.Kabashima, S.Hamaguchi, N.Seki, T.Suzuki, T.Okamura
International Symposium on Safety of Superconductors and Related Heat Transfer at Low Temperatures 1C2:1-7 1994
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入口スワールを有するディスク型ＣＣＭＨＤ発電機の発電特性
原田信弘, 岡村哲至, 木塚宣明, 山岬裕之, 塩田進
電気学会論文誌Ｂ 114 ( 6 ) 626 - 632 1994
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2-DIMENSIONAL NUMERICAL-SIMULATION ON HE-II HEAT-TRANSPORT
T OKAMURA, S HAMAGUCHI, S KABASHIMA
CRYOGENICS 34 ( ICEC Sup. ) 305 - 308 1994
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入口スワールを有するディスク型MHD発電機の発電特性
原田信弘, 岡村哲至, 木塚宣明, 山岬裕之, 塩田進
電気学会論文誌B 114 ( 6 ) 626 - 632 1994
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Review and New Results of High Enthalpy Extraction Experiments at Tokyo Institute of Technology
T.Okamura, N.Harada, S.Kabashima, K.Yoshikawa, T.Suekane, K.Tsuji, Y.Okuno, S.Shioda, H.Yamasaki, Y.Hasegawa, K.Matsutani, M.Ishimura, Y.Dozono, S.Ikeda
Proc. of 32nd Symposium on Engineering Aspects of MHD 1994
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Review and New Results of High Enthalpy Extraction Experiments at Tokyo Institute of Technology
OKAMURA T
Proc. of 32nd SEAM 1994
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EXPERIMENTAL STUDIES OF CLOSED CYCLE MHD POWER-GENERATION WITH FUJI-1 BLOW-DOWN FACILITY
N HARADA, T SUEKANE, K TSUNODA, T OKAMURA, K YOSHIKAWA, H YAMASAKI, S KABASHIMA, S SHIODA
ENERGY CONVERSION AND MANAGEMENT 34 ( 6 ) 433 - 446 1993.6
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Supersonic Flow in Faraday-type MHD Generators.
窪田洋一郎, 義家亮, 岡村哲至, 原田信弘, 山岬裕之
エネルギー利用と直接発電シンポジウム 15th 1993
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Improvement of Generator Performance in FUJI-1 CCMHD Blow-down Experiment
N.Harada, T.Suekane, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Shioda
Proc. of 31st Symposium on Engineering Aspects of MHD IVa.1.1-IVa.1.9 1993
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Demonstration of Enthalpy Extraction Over 30% with Shock-Tube Driven Disk MHD Generator
HARADA N.
Proc. of 31th SEAM III.2.1-III.2.9 - III29 1993
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Improvement of Enthalpy Extraction above 30% in Disk CCMHD Generator with Inlet Swirl
HARADA N.
AIAA 24th Plasmadynamics and Lasers Conference 1993
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Heat Transport in Pressurized HeII Channel with Phase Transition -Experiment -
Cryogenic Engineering 28 ( 9 ) 540 - 544 1993
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Heat Transport with Phase Transition in a Pressurized He II Channel. Experiment.:Experiment
OKAMURA Tetsuji, SUZUKI Takayuki, KABASHIMA Shigeharu
TEION KOGAKU 28 ( 9 ) 540 - 544 1993
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Improvement of Generator Performance in FUJI-1 CCMHD Blow-down Experiment
N.Harada, T.Suekane, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Shioda
Proc. of 31st Symposium on Engineering Aspects of MHD IVa.1.1-IVa.1.9 1993
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Demonstration of Enthalpy Extraction over 30% with Shock-tube Driven Disk MHD Generator
N.Harada, N.Kizuka, T.Okamura, H.Yamasaki, S.Shioda
Proc. of 31st Symposium on Engineering Aspects of MHD III.2.1-III.2.9 1993
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Improvement of Enthalpy Extraction above 30% in Disk CCMHD Generator with Inlet Swirl
N.Harada, N.Kizuka, T.Okamura, S.Shioda
24th AIAA Plasmadynamics and Lasers Conference 1993
-
Effects of Working Gas Temperature on Performance of a CCMHD Generator
The Transactions of The Institute of Electrical Engineers of Japan 113 ( 3 ) 259 - 265 1993
-
High Enthalpy Extraction Experiments with Disk MHD Generators
Kazumi Tsunoda, Kohgi Kariya, Tetsuya Suekane, Hiroyuki Yamasaki, Tetsuji Okamura, Nobuhiro Harada, Kunio Yoshikawa, Shigeharu Kabashima, Susumu Shioda
Transactions of the Japan Society of Mechanical Engineers 59 ( 562 ) 1876 - 1882 1993
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Heat Transport in Pressurized HeII Channel with Phase Transition -Numerical Simulation -
Cryogenic Engineering 28 ( 9 ) 545 - 549 1993
-
ＣＣＭＨＤ発電機の性能に与える作動気体温度の影響
末包哲也, 角田和巳, 岡村哲至, 原田信弘, 吉川邦夫, 椛島成治, 塩田進
電気学会論文誌Ｂ 113 ( 3 ) 259 - 265 1993
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High Enthalpy Extraction Experiments with Disk MHD Generators
Tsunoda Kazumi, Kariya Kohgi, Suekane Tetsuya, Yamasaki Hiroyuki, Okamura Tetsuji, Harada Nobuhiro, Yoshikawa Kunio, Kabashima Shigeharu, Shioda Susumu
Transactions of the Japan Society of Mechanical Engineers. Series B. 59 ( 562 ) 102 - 108 1993
-
OKAMURA Tetsuji, SEKI Nobumasa, KABASHIMA Shigeharu
TEION KOGAKU 28 ( 9 ) 545 - 549 1993
-
Preliminary Study on Next Test Facility for Closed Cycle MHD Power Generation (FUJI-2) - Part II: Disk Type Generator -
S.Ikeda T.Yamamoto, K.Shioda, M.Takahashi M.Ishimura, Y.Douzono, S.Itoh, T.Okamura, N.Harada
Proc. of 11th International Conference on MHD Power Generation 1101 - 1105 1992
-
Performance and Conceptual Design of Superconducting Magnet for Disk MHD Generator
T.Okamura, Y.Okuno, S.Kabashima, S.Shioda
Electrical Engineering in Japan 112 ( 4 ) 65 - 73 1992
-
Preliminary Study on Next Test Facility for Closed Cycle MHD Power Generation (FUJI-2) - Part II: Disk Type Generator -
S.Ikeda T.Yamamoto, K.Shioda, M.Takahashi M.Ishimura, Y.Douzono, S.Itoh, T.Okamura, N.Harada
Proc. of 11th International Conference on MHD Power Generation 1101 - 1105 1992
-
Preliminary Study on Next Test Facility for Closed Cycle MHD Power Generation (FUJI-2) - Part III: Superconducting Magnet -
T.Okamura, S.Kabashima, S.Shioda, Y.Sumiyoshi, Y.Douzono, S.Ikeda M.Ishimura
Proc. of 11th International Conference on MHD Power Generation 1106 - 1110 1992
-
Current Distrubution in MHD Disk Generators
T.Okamura, N.Harada, K.Kurosu, K.Nakamichi, S.Kabashima, S.Shioda
Proc. of 11th International Conference on MHD Power Generation 1139 - 1145 1992
-
Effect of channel shape on the performance of closed cycle MHD generator
HARADA N.
Proc. 11th Int. Conf. MHD Energy Conversion, Bejing, China, 1992 4 1161 - 1166 1992
-
OKAMURA Tetsuji, YAMASHITA Norimichi, YOSHIZAWA Yoshio
TEION KOGAKU 27 ( 6 ) 502 - 506 1992
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Performance and conceptual design of superconducting magnet for disk MHD generator
Tetsuji Okamura, Shigeharu Kabashima, Susumu Shioda, Yoshihiro Okuno
Electrical Engineering in Japan 112 ( 4 ) 65 - 73 1992
-
Measurement of Gas Velocity in an MHD Generator
T.Utsumi T.Okamura, N.Harada, S.Kabashima, S.Shioda
Proc. of the 3rd Japan-CIS MHD Symposium 3.2.1-3.2.11 1992
-
Experiments with Improved Heat Exchanger in the FUJI-1 Facility
N.Harada, T.Okamura, K.Tsunoda, K.Yoshikawa, S.Kabashima, S.Shioda, H.Yamasaki, Y.Hasegawa, S.Ikeda, Y.Douzono, M.Ishimura
Proc. of the 3rd Japan-CIS MHD Symposium 4.4.1-4.4.9 1992
-
Measurements of Current Distribution in MHD Disk Generators
T.Okamura, N.Harada, K.Kurosu, K.Nakamichi, N.Kizuka, T.Ishikawa, S.Kabashima
Proc. of the 3rd Japan-CIS MHD Symposium 8.3.1-8.3.7 1992
-
Recent Studies on Closed Cycle MHD Power Generation
N.Harada, T.Okamura, K.Yoshikawa, S.Kabashima, S.Shioda
Proc. of 30th Symposium on Engineering Aspects of MHD IX.5.1-IX.5.9 1992
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Preliminary Study on Next Test Facility for Closed Cycle MHD Power Generation (FUJI-2) - Part I: Outline of the Plan -
K.Yoshikawa, T.Okamura, N.Harada, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa, Y.Douzono, M.Ishimura K.Matsutani, S.Natani, T.Arai
Proc. of 11th International Conference on MHD Power Generation 1095 - 1100 1992
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Current Distrubution in MHD Disk Generators
T.Okamura, N.Harada, K.Kurosu, K.Nakamichi, S.Kabashima, S.Shioda
Proc. of 11th International Conference on MHD Power Generation 1139 - 1145 1992
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Experimental Studies of Closed Cycle MHD Power Generation with FUJI-1 Blow-down Facility
N.Harada, T.Suekane, K.Tsunoda, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa, S.Ikeda, Y.Douzono, M.Ishimura
Proc. of 11th International Conference on MHD Power Generation 1153 - 1160 1992
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Preliminary Study on Next Test Facility for Closed Cycle MHD Power Generation (FUJI-2) - Part III: Superconducting Magnet -
T.Okamura, S.Kabashima, S.Shioda, Y.Sumiyoshi, Y.Douzono, S.Ikeda M.Ishimura
Proc. of 11th International Conference on MHD Power Generation 1106 - 1110 1992
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Measurement of Gas Velocity in an MHD Generator
T.Utsumi T.Okamura, N.Harada, S.Kabashima, S.Shioda
Proc. of the 3rd Japan-CIS MHD Symposium 3.2.1-3.2.11 1992
-
Experiments with Improved Heat Exchanger in the FUJI-1 Facility
N.Harada, T.Okamura, K.Tsunoda, K.Yoshikawa, S.Kabashima, S.Shioda, H.Yamasaki, Y.Hasegawa, S.Ikeda, Y.Douzono, M.Ishimura
Proc. of the 3rd Japan-CIS MHD Symposium 4.4.1-4.4.9 1992
-
Current Distribution in MHD Disk Generators
OKAMURA T.
Proc. of 11st Int. Conf. on MHD 8.3.1-8.3.7 - 1145 1992
-
Recent Studies on Closed Cycle MHD Power Generation
N.Harada, T.Okamura, K.Yoshikawa, S.Kabashima, S.Shioda
Proc. of 30th Symposium on Engineering Aspects of MHD IX.5.1-IX.5.9 1992
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Preliminary Study on Next Test Facility for Closed Cycle MHD Power Generation (FUJI-2) - Part I: Outline of the Plan -
K.Yoshikawa, T.Okamura, N.Harada, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa, Y.Douzono, M.Ishimura K.Matsutani, S.Natani, T.Arai
Proc. of 11th International Conference on MHD Power Generation 1095 - 1100 1992
-
Tetsuji OKAMURA, Norimichi YAMASHITA, Yoshio YOSHIZAWA
Cryogenic Engineering 27 ( 6 ) 502 - 506 1992
-
Experimental Studies of Closed Cycle MHD Power Generation with FUJI-1 Blow-down Facility
N.Harada, T.Suekane, K.Tsunoda, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa, S.Ikeda, Y.Douzono, M.Ishimura
Proc. of 11th International Conference on MHD Power Generation 1153 - 1160 1992
-
Effect of Channel Shape on the Performance of Closed Cycle Disk MHD Generator
N.Harada, T.Ishikawa, N.Kizuka, K.Nakamichi, T.Okamura, S.Shioda
Proc. of 11th International Conference on MHD Power Generation 1161 - 1166 1992
-
High Performance Demonstration Experiments with FUJI-1 Facility
N.Harada, H.Yamasaki, K.Yoshikawa, T.Okamura, S.Kabashima, S.Shioda, H.Hasegawa, Y.Douzono, M.Ishimura S.Ikeda
Proc. of 1st Japan-USSR MHD Symposium 177 - 189 1991
-
Preliminary Design of Superconducting Magnet for the Next Test Facility FUJI-2
T.Okamura, S.Kabashima, S.Shioda, Y.Sumiyoshi, Y.Douzono, S.Ikeda M.Ishimura
Proc. of International Workshop on MHD Superconducting Magnets 85 - 89 1991
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Performance and Conceptual Design of Superconducting Magnet for Disk MHD Generator
The Transactions of The Institute of Electrical Engineers of Japan 111 ( 4 ) 461 - 467 1991
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Performance of FUJI-1 Superconducting Magnet
T.Okamura, S.Kabashima, S.Shioda
Proc. of International Workshop on MHD Superconducting Magnets 27 - 30 1991
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Preliminary Design of Superconducting Magnet for the Next Test Facility FUJI-2
T.Okamura, S.Kabashima, S.Shioda, Y.Sumiyoshi, Y.Douzono, S.Ikeda M.Ishimura
Proc. of International Workshop on MHD Superconducting Magnets 85 - 89 1991
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Performance of FUJI-1 Superconducting Magnet
T.Okamura, S.Kabashima, S.Shioda
Proc. of International Workshop on MHD Superconducting Magnets 27 - 30 1991
-
High Performance Demonstration Experiments with FUJI-1 Facility
N.Harada, H.Yamasaki, K.Yoshikawa, T.Okamura, S.Kabashima, S.Shioda, H.Hasegawa, Y.Douzono, M.Ishimura S.Ikeda
Proc. of 1st Japan-USSR MHD Symposium 177 - 189 1991
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ディスク型MHD発電機用超電導磁石の性能と概念設計
岡村哲至, 奥野喜裕, 椛島成治, 塩田進
電気学会論文誌B 111 ( 4 ) 461 - 467 1991
-
Next Test Facility for CCMHD (FUJI-2)
T.Okamura, N.Harada, K.Yoshikawa, H.Yamasaki, S.Kabashima, S.Shioda, H.Hasegawa, M.Ishimura, Y.Douzono, H.Mukaida, S.Ikeda
Proc. of 29th Symposium on Engineering Aspects of MHD IV.5.1-IV.5.6 1991
-
Results of FUJI-1 Power Extraction Experiment Driven by Helium
N.Harada, Y.Saito, K.Tsunoda, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa, M.Ishimura, Y.Douzono, S.Ikeda, T.Yokota
Proc. of 29th Symposium on Engineering Aspects of MHD VIII.3.1-VIII.3.9 1991
-
Recent Results with FUJI-1 CCMHD Power Generation Experiments and Next Test Facility FUJI-2
N.Harada, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa, M.Ishimura, Y.Douzono, S.Ikeda
Proc. of International Scientific Workshop on MHD Generators of Closed Cycle with Structural Ununiformities in the Flow of Operational Gas 1991
-
Results of FUJI-1 Power Extraction Experiment Driven by Helium
N.Harada, Y.Saito, K.Tsunoda, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa, M.Ishimura, Y.Douzono, S.Ikeda, T.Yokota
Proc. of 29th Symposium on Engineering Aspects of MHD VIII.3.1-VIII.3.9 1991
-
Recent Results with FUJI-1 CCMHD Power Generation Experiments and Next Test Facility FUJI-2
N.Harada, T.Okamura, K.Yoshikawa, H.Yamasaki, S.Kabashima, S.Shioda, Y.Hasegawa, M.Ishimura, Y.Douzono, S.Ikeda
Proc. of International Scientific Workshop on MHD Generators of Closed Cycle with Structural Ununiformities in the Flow of Operational Gas 1991
-
Next Test Facility for CCMHD (FUJI-2)
T.Okamura, N.Harada, K.Yoshikawa, H.Yamasaki, S.Kabashima, S.Shioda, H.Hasegawa, M.Ishimura, Y.Douzono, H.Mukaida, S.Ikeda
Proc. of 29th Symposium on Engineering Aspects of MHD IV.5.1-IV.5.6 1991
-
Feasibility of a Disk Type Non-equilibrium MHD Generator with Subsonic Flow
The Transactions of The Institute of Electrical Engineers of Japan 110 ( 7 ) 603 - 608 1990
-
Boiling heat transfer in vertical superfluid helium channel.
OKAMURA Tetsuji, SAGAWA Yukihide, YOSHIZAWA Yoshio
TEION KOGAKU 25 ( 4 ) 260 - 264 1990
-
Boiling Heat Transfer of Super fliud Helium in a Vertical Channel
Cryogeic Engineering 25 ( 4 ) 260 - 264 1990
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奥野喜裕, 岡村哲至, 塩田進
電気学会論文誌B 110 ( 7 ) 603 - 608 1990
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TIME-DEPENDENT HEAT-TRANSFER IN PRESSURIZED SUPERFLUID-HELIUM
T OKAMURA, Y YOSHIZAWA, A SATO, K ISHITO, S KABASHIMA, S SHIODA
CRYOGENICS 29 ( 11 ) 1070 - 1074 1989.11
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High Field Superconducting Magnet for a Closed Cycle Disk MHD Generator
T.Okamura, Y.Okuno, S.Shioda
Proc. of 11th International Conference on Magnet Technology 507 - 512 1989
-
Boiling Heat Transfer in Pressurized Superfluid Helium Channel
Tetsuji OKAMURA, Kouichi ISHITO, Sei KEIMATSU, Shigeharu KABASHIMA, Akio SATO
Cryogenic Engineering 24 ( 6 ) 345 - 350 1989
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Current Leads Design Considering Unsteady State
T.Yazawa, A.Sato, T.Okamura, K.Ishito, S.Kabashima
Proc. of 11th International Conference on Magnet Technology 1381 - 1386 1989
-
High Field Superconducting Magnet for a Closed Cycle Disk MHD Generator
T.Okamura, Y.Okuno, S.Shioda
Proc. of 11th International Conference on Magnet Technology 507 - 512 1989
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Boiling heat transfer in pressurized superfluid helium channel.
OKAMURA Tetsuji, ISHITO Kouichi, KEIMATSU Sei, KABASHIMA Shigeharu, SATO Akio
TEION KOGAKU 24 ( 6 ) 345 - 350 1989
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Current Leads Design Considering Unsteady State
T.Yazawa, A.Sato, T.Okamura, K.Ishito, S.Kabashima
Proc. of 11th International Conference on Magnet Technology 1381 - 1386 1989
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Time Dependent Heat Transfer in Pressurized Super Fliud Helium
Tetsuji OKAMURA, Yoshio YOSHIZAWA, Akio SATO, Kouichi ISHITO, Shigeharu KABASHIMA, Susumu SHIODA
Cryogenic Engineering 23 ( 6 ) 344 - 349 1988
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Time dependent heat transfer in pressurized superfluid helium.
OKAMURA Tetsuji, YOSHIZAWA Yoshio, SATO Akio, ISHITO Kouichi, KABASHIMA Shigeharu, SHIODA Susumu
TEION KOGAKU 23 ( 6 ) 344 - 349 1988
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SUPERCONDUCTING MAGNET FOR A HELIUM-DRIVEN DISK MHD GENERATOR
T OKAMURA, S KABASHIMA, S SHIODA
JOURNAL OF PROPULSION AND POWER 3 ( 6 ) 552 - 559 1987.11
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Superconducting Magnet for a Full Scale Helium-Driven Disk MHD Generator
T.Okamura, S.Kabashima, S.Shioda
Proc. of 9th International Conference on MHD Power Generation 125 - 134 1986
-
Superconducting Magnet for a Full Scale Helium-Driven Disk MHD Generator
T.Okamura, Y.Okuno, S.Shioda
Proc. of 9th International Conference on MHD Power Generation 125 - 134 1986
-
Superconducting Magnet for a Full Scale Helium-Driven Disk MHD Generator
T.Okamura, S.Kabashima, S.Shioda
Proc. of 9th International Conference on MHD Power Generation 125 - 134 1986
-
Superconducting Magnet for a Full Scale Helium-Driven Disk MHD Generator
T.Okamura, Y.Okuno, S.Shioda
Proc. of 9th International Conference on MHD Power Generation 125 - 134 1986
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EXPERIMENTAL STUDIES ON THERMAL PERFORMANCE OF A PEBBLE BED HIGH-TEMPERATURE HEAT-EXCHANGER
K YOSHIKAWA, H KAJIYAMA, T OKAMURA, S KABASHIMA, H YAMASAKI, S SHIODA, M YAMADA, T YOKOTA, M ISHIMURA, K NAKAYAMA, K NAKAMOTO, T SASAKI
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME 107 ( 3 ) 722 - 727 1985
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OKAMURA Tetsuji, SHIODA Susumu, KABASHIMA Shigeharu, SANADA Yoshinao
TEION KOGAKU 20 ( 6 ) 332 - 336 1985
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Superconducting Magnet for a Disk Generator of the FUJI-1 MHD Facility(Design)
Tetsuji OKAMURA, Susumu SHIODA, Shigeharu KABASHIMA, Yoshinao SANADA
Cryogenic Engineering 20 ( 6 ) 325 - 331 1985
-
Superconducting Magnet for a Disk Generator of the FUJI-1 MHD Facility (Performance Tests)
Tetsuji OKAMURA, Susumu SHIODA, Shigeharu KABASHIMA, Yoshinao SANADA
Cryogenic Engineering 20 ( 6 ) 332 - 336 1985
-
SUPERCONDUCTING MAGNET FOR A DISK GENERATOR OF THE FUJI-1 MHD FACILITY
T OKAMURA, S KABASHIMA, S SHIODA, Y SANADA
CRYOGENICS 25 ( 9 ) 483 - 491 1985
-
SUPERCONDUCTING MAGNET FOR A DISK GENERATOR OF THE FUJI-1 MHD FACILITY
T OKAMURA, S KABASHIMA, S SHIODA, Y SANADA
CRYOGENICS 25 ( 9 ) 483 - 491 1985
-
Superconducting magnet for a disk generator of the FUJI-1 MHD facility (design):Design
OKAMURA Tetsuji, SHIODA Susumu, KABASHIMA Shigeharu, SANADA Yoshinao
TEION KOGAKU 20 ( 6 ) 325 - 331 1985
-
Recent Results of Power Generation Experiments with the FUJI-1 Facility
H.Yamasaki, S.Kabashima, K.Yoshikawa, N.Harada, Y.Okuno, T.Okamura, S.Shioda
Proc. of 22nd Symposium on Engineering Aspects of MHD 3:4:1-3:4:18 1984
-
Conceputual Design Study of 1000MWt Helium Closed Cycle MHD Power Plants
K.Yoshikawa, S.Kabashima, H.Yamasaki, Y.Okuno, T.Okamura, S.Shioda
Proc. of 22nd Symposium on Engineering Aspects of MHD 7:1:1-7:1:5 1984
-
Conceputual Design Study of 1000MWt Helium Closed Cycle MHD Power Plants
K.Yoshikawa, S.Kabashima, H.Yamasaki, Y.Okuno, T.Okamura, S.Shioda
Proc. of 22nd Symposium on Engineering Aspects of MHD 7:1:1-7:1:5 1984
-
Recent Results of Power Generation Experiments with the FUJI-1 Facility
H.Yamasaki, S.Kabashima, K.Yoshikawa, N.Harada, Y.Okuno, T.Okamura, S.Shioda
Proc. of 22nd Symposium on Engineering Aspects of MHD 3:4:1-3:4:18 1984
-
Comparative Studies on Argon and Helium Closed Cycle MHD Power Plants Combined with Fossil Fuel
K.Yoshikawa, S.Kabashima, H.Yamasaki, Y.Okuno, T.Okamura, H.Fukuda, S.Shioda
Proc. of 8th International Conference on MHD Power Generation a.4.1-a.4.4 1983
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Comparative Studies on Argon and Helium Closed Cycle MHD Power Plants Combined with Fossil Fuel
K.Yoshikawa, S.Kabashima, H.Yamasaki, Y.Okuno, T.Okamura, H.Fukuda, S.Shioda
Proc. of 8th International Conference on MHD Power Generation a.4.1-a.4.4 1983
Presentations
-
Improvement of a 4 Kelvin Cryogenic Probe for 500 MHz Solution NMR
47th Experimental Nuclear Magnetic Resonance Conference 2006
-
Experimental and Numerical Studies on Thermal Hydraulic Characteristics of He II through Porous Media
CEC/ICMC 2006
-
Cryocooler-cooled High Tc Superconducting Magnet Excited by a Semiconductor Thermoelectric Element
CEC/ICMC 2006
-
4 Kelvin Cryogenic Probe for 500 MHz NMR
CEC/ICMC 2006
-
Tesla Class Quasi-persistent Mode HTS Magnet Excited by Thermoelectric Element
20th International Conference on Magnet Technology 2007
-
Results of the Excitation Test of the LHD Helical Coils Cooled by Subcooled Helium
20th International Conference on Magnet Technology 2007
-
Performance of upgraded cooling system for LHD helical coils
CEC/ICMC 2007 2007
-
An Experimental Study of He II Two-phase Flow in a Long Horizontal Pipe
CEC/ICMC 2007 2007
-
4 Kelvin Cryogenic Probe for 500 MHz NMR
CEC/ICMC 2006
-
Research on Improvement in the Efficiency of the GM Refrigerator
14th International Cryocooler Conference 2006
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Cryocooler-cooled High Tc Superconducting Magnet Excited by a Semiconductor Thermoelectric Element
CEC/ICMC 2006
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Performance of a Room-temperature Rotary Magnetic Refrigerator
1st International Conference on Magnetic Refrigeration at Room Temperature 2005
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Development of a 4 Kelvin Cryogenic Probe for 500 MHz Solution NMR
46th Experimental Nuclear Magnetic Resonance Conference 2005
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Thermal stability study in YBCO-coated conductor
19th International Conference on Magnet Technology 2005
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Application of Thermoelectric Element to Aircraft's Onboard Superconducting Magnet
15th International Conference on MHD Energy Conversion 2005
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Performance of a Room-temperature Rotary Magnetic Refrigerator
1st International Conference on Magnetic Refrigeration at Room Temperature 2005
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Research on Improvement in the Efficiency of the GM Refrigerator
14th International Cryocooler Conference 2006
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Improvement of a 4 Kelvin Cryogenic Probe for 500 MHz Solution NMR
47th Experimental Nuclear Magnetic Resonance Conference 2006
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Experimental and Numerical Studies on Thermal Hydraulic Characteristics of He II through Porous Media
CEC/ICMC 2006
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Application of Thermoelectric Element to Aircraft's Onboard Superconducting Magnet
15th International Conference on MHD Energy Conversion 2005
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Development of a 4 Kelvin Cryogenic Probe for 500 MHz Solution NMR
46th Experimental Nuclear Magnetic Resonance Conference 2005
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Thermal stability study in YBCO-coated conductor
19th International Conference on Magnet Technology 2005
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Development of High Field Superconducting Magnet Cooled by 2K Cryocooler (1) -Magnet and Cooling System-
2004
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Development of High Field Superconducting Magnet Cooled by 2K Cryocooler (1) -Magnet and Cooling System-
2004
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Results of the Excitation Test of the LHD Helical Coils Cooled by Subcooled Helium
20th International Conference on Magnet Technology 2007
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Performance of upgraded cooling system for LHD helical coils
CEC/ICMC 2007 2007
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An Experimental Study of He II Two-phase Flow in a Long Horizontal Pipe
CEC/ICMC 2007 2007
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Improvement of 100W Class Room Temperature Magnetic Refrigerator
2nd International Conference on Magnetic Refrigeration at Room Temperature 2007
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Development of Room Temperature Magnetic Refrigerator - Overall Plan -
2nd International Conference on Magnetic Refrigeration at Room Temperature 2007
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Improvement of 100W Class Room Temperature Magnetic Refrigerator
2nd International Conference on Magnetic Refrigeration at Room Temperature 2007
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Development of Room Temperature Magnetic Refrigerator - Overall Plan -
2nd International Conference on Magnetic Refrigeration at Room Temperature 2007
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Tesla Class Quasi-persistent Mode HTS Magnet Excited by Thermoelectric Element
20th International Conference on Magnet Technology 2007
Works
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超高効率磁気冷凍システムのカスケード接続に関する調査研究
2009
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超高効率磁気冷凍システムの実現性検討に関する調査研究
2008
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LHD過冷却システムの制御法の最適化
2007
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超流動ヘリウムを用いた大型装置の冷却システムに関する研究
2007
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室温磁気冷凍システムの低消費電力化に関する研究
2007
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Optimization of the control of the subcooling system of the LHD
2007
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磁気冷凍システムの熱流動性能向上化技術開発に関する研究
2006
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ＮＭＲプローブの高感度化
2006
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LHD過冷却システムの制御法の最適化
2006
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Optimization of the control of the subcooling system of the LHD
2006
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磁気冷凍システムの低損失化技術開発に関する研究
2005
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LHDヘリウム冷却系統の流量分配の最適化
2005
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ＮＭＲプローブの高感度化
2004
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超伝導磁石の冷却性能向上のためのファウンテン効果の非定常熱輸送特性に関する研究
2003
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極低温下における熱電素子の基礎特性把握と熱電素子を用いた高温超電導コイルの通電
2003
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Studies on transient heat transport characteristics of fountain effect for an improvement in cooling performance of superconducting magnets
2003
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NMRﾌﾟﾛｰﾌﾞの高感度化
2003
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冷凍機要素開発
2002
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NMRﾌﾟﾛｰﾌﾞの高感度化
2002
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熱電素子の極低温下における熱的・電気的特性に関する研究
2002
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高性能２Ｋ予冷熱交換器概念設計
2002
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Heat Transport in Superfluid Helium with Phase Transition
2001
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超流動ヘリウム中で相変化が生じる場合の熱輸送
2001
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高信頼低損失超電導マグネットの開発
2001
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高信頼冷凍機の開発
2000
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Computer Assisted Instruction Using Personal Computer on Graphic Sciecne
1989
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図学におけるパソコンCAIの検討
1989
Awards
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平成28年度技術進歩賞
2016.5 低温工学・超電導学会 1kW級室温磁気ヒートポンプの開発
宮崎佳樹, 池田和也, 長谷川均, 平野直樹, 野口芳直, 岡村哲至, 裵 相哲, 川南 剛
Research Projects
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Investigation of quasi-persistent current mode by thermoelectric element for NMR/MRI high-temperature superconducting magnets
Grant number：15K13893 2015.4 - 2018.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research
TAKAHASHI Masato
Grant amount：\3900000 （ Direct Cost: \3000000 、 Indirect Cost：\900000 ）
The method to drive high-temperature superconducting magnets efficiently has been studied without using an external power supply and a current lead. The method of using a semiconductor such as a thermoelectric element to the cryogenic side is very compact and can be driven in a simple structure compared to an external power supply. The experiment was performed using a commonly used bismuth tellurium. It was confirmed that it is possible to generate a large and stable current. However, considering the cooling performance of the cryogenic refrigerator used to cool the high-temperature superconducting magnet, it became clear that the device with higher conversion efficiency is needed. A variety of devices were investigated. It was able to find the element which improved the characteristic by low temperature with high conversion efficiency.
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Development of 1-Tesla Class High Temperature Superconducting Magnet Excited by Thermoelectric Element
Grant number：18360101 2006 - 2007
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
OKAMURA Tetsuji
Grant amount：\16260000 （ Direct Cost: \15300000 、 Indirect Cost：\960000 ）
A high temperature superconducting (HTS) magnet excited by a thermoelectric element has been developed. This HTS magnet has the advantages of compactness and lightweight in comparison with conventional HTS magnets. Because an external power supply is not necessary for this magnet system to maintain an operating current.
The main components of the magnet system are a thermoelectric element, an HTS coil and a cryocooler. The thermoelectric element is made with p-type Bi2Te3 semiconductor pellets and cooled by the first stage of the cryocooler. The size of the thermoelectric element is 2 mm square and 1.5 mm in thickness. The HTS coil is wounded with Bi-2223 wires and cooled by the second stage of the cryocooler. The inner diameter, outer diameter and the height of the coil are 120 mm, 236 mm and 31 mm, respectively.
The magnetic field at the center of the magnet of 1.4 T was demonstrated in the present experiment with the operating current of 155 A. The temperature of the hot end and cold end of the thermoelectric element was 100 K and 60 K. The coil temperature was about 10 K. It took 6.5 hours to reach the target magnetic field of 1 T with a constant heat input of 25 W. The long charging time to the rated current might be a serious problem. However, this problem should be manageable using an external power supply during charging. The external power supply is separated with the magnet unless the magnet is in case of charge. -
Study on Performance of Environmentally Benign and High Efficiency Plasma MHD Generator under Continuous Operation
Grant number：15106005 2003 - 2007
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)
YAMASAKI Hiroyuki, OKUNO Yoshihiro, OKAMURA Tetsuji, MURAKAMI Tomoyuki, OHGAKI K
Grant amount：\87880000 （ Direct Cost: \67600000 、 Indirect Cost：\20280000 ）
The development of environmentally benign and highly efficient power plant is important to reduce CO2 emission and to save energy resources. The present research was focused on a plasma MHD generator, and performances of the supersonic closed loop with the disk MHD generator were investigated. The closed loop is a major system in the MHD power plant, and noble gas circulates inside the closed loop. In the present experiment, argon was used as working fluid. Experimental results are summarized as follows.
The high temperature (>1900K) argon circulation was carried out successfully during 2.4 hours. The heat gain and loss of argon was investigated, and a large heat loss was found at the diffuser and the exhausting duct although an energy efficiency of recuperator was high. The large heat loss was ascribed to water cooling at the diffuser and the exhausting duct. At the same time, the enhancement of heat transfer coefficient was suggested. The argon temperature and the heat loss calculated under an assumption of four times larger heat transfer coefficient have shown a good agreement with experimental ones. The pressure ratio inside the loop was discussed, and the result has indicated that the total pressure at the upstream of nozzle throat is decided by the total temperature and the mass flow. On the other hand, the total pressure at the downstream is determined by the total mass in the loop and the total pressure at the upstream. The power generation was carried out, and a good correlation between the load resistance and the Hall voltage was observed. However, the power output remained very small. -
熱起電力による高温超伝導コイルの通電特性
Grant number：15656054 2003 - 2004
日本学術振興会 科学研究費助成事業 萌芽研究
岡村 哲至
Grant amount：\3300000 （ Direct Cost: \3300000 ）
熱電素子を組み込んだ回路内の全電気抵抗における、熱電素子の内部抵抗や超伝導コイルのフラックスフロー抵抗など、各部の電気抵抗値の割合を明らかにするために、小型の高温超伝導コイルと熱電素子を組み合わせて、永久電流通電実験を行った。コイルは、ビスマス系2223銀シース超伝導線を使って、既存のクライオスタット内に収めた。コイルは、1段パンケーキ巻きで、外径190mm、内径100mm、厚さ7mmである。熱伝素子は平成15年度の実験結果より、片極接続の方がπ型接続に比べ高い性能が得られることが明らかになっているので、片極接続とした。
熱電素子の高温部に張り付けたヒーターの温度を変化させることで、熱電素子の起電力が変化し、システム内に流れる電流値を制御できることを確かめた。実験で、システム内に取り付けられた電圧タップから、熱電素子の内部抵抗、超伝導コイルのフラックスフロー抵抗、回路構成のための接続抵抗など計測した結果、通電電流値が大きくなると、超伝導コイルの温度が上昇し抵抗がシステム全体の抵抗の約1/3を占めることがわかった。
そこで2段GM冷凍機を用いて、コイルの作動温度の上昇を低減し、しかも熱電素子の温度を70Kから100Kに保つ条件で、通電実験を行った。その結果、単位電流を通電するために必要なヒーターへの入力電力が0.15Wであった。この値は、現在用いられている、最適化された高温超伝導マグネット用の電流リードの、0.09W/Aに比較的近い値である。本研究では、n型Bi_2Te半導体を用いた、厚さ1.5mm、断面積635mmの熱伝素子によって、短絡通電では最大237.5A、高温超伝導コイル通電では185.3Aを通電することができた。 -
IMPROVEMENT ON ISENTROPIC EFFICIENCY OF PLASMA MHD GENERATOR BY HELIUM
Grant number：12305017 2000 - 2002
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
YAMASAKI Hiroyuki, MURAKAMI Tomoyuki, OKAMURA Tetsuji, OKUNO Yoshihiro, OHGAKI Kumiko, BISWAS Debasis
Grant amount：\26580000 （ Direct Cost: \22500000 、 Indirect Cost：\4080000 ）
The objective of present study is to improve the isentropic efficiency of the plasma MHD generator which is expected to provide very high thermal efficiency.
In the fiscal year 2000, the plasma formation in the supersonic nozzle was investigated experimentally. The experimental results indicated that the plasma formation is difficult at low seed fractions and depends on nozzle load resistance. Furthermore, it is suggested that the shock wave appears and as a result, the flow velocity is reduced significantly at high seed fractions, although the plasma formation becomes easy. As a result, the enthalpy extraction remained small and it was only 9 %.
The nozzle load resistance was optimized in the fiscal year 2001 and the enthalpy extraction increased from 9 % to 14 %. At the same time, the power output increased up to 650 kW and the advantage of high flow velocity in helium was confirmed. The isentropic efficiency was also improved significantly and the measured voltage-current curve showed higher voltage compared with that for argon.
In the fiscal year 2002, the operating condition was optimized further and an introduction of an inlet swirl was adopted. Therefore, the enthalpy extraction increased up to 30.3 % and the isentropic efficiency was remarkably improved (=63 %). The large power output of 1200 kW was also obtained. These results are the highest among all experimental data in the world.
These results have encouraged us to proceed to the next step. In the next step, we have a plan to investigate performances of plasma MHD generator under long operation time using the supersonic closed loop experimental facility. -
Improvement on Superconducting Magnet Performance using Fountain Effect of Superfluid Helium
Grant number：12650193 2000 - 2001
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
OKAMURA Tetsuji
Grant amount：\3600000 （ Direct Cost: \3600000 ）
Heat transport characteristics of superfluid helium (He n) in channel segmented by different types of spacer having several holes have been investigated on the basis of both experiment and numerical analysis. The heat transport performance has been examined for the following spacers : (a) FRP spacer without any hole, (b) FRP spacer with several holes of 2 or 4 mm diameter, (c) porous spacer made of fine powder of sintered Al_2O_3, (d) porous spacer made of high density polyethylene (HDPE) which is more flexible than Al_2O_3. The average diameter of the porous is about 1μm. It is expected that helium flow is induced in the channel because of a fountain effect when the porous spacer is applied.
The λ-transition heat flux when we use the spacers having holes of diameter 2 mm and 4 mm is almost the same. This value is about 1.5 times larger than that in the case of using spacer without any hole. The λ-transition heat flux depends on the porosity of the spacer. A relatively high cooling performance can be realized when the porosity is only about 5%. These results lead to the understanding that the introduction of some holes in the spacer is a very effective way to suppress local temperature rise in the He II channel.
The λ-transition heat flux increases remarkably when the porous spacer is used instead of the FRP spacer with holes of 2 or 4 mm in diameter, because Hen flow is induced in the heated channel by a fountain effect. It is also found that the use of porous spacers between Hell channels is effective to suppress a steep temperature rise in the heated channel not only when the channel is filled with He II entirely but also when normal helium (He I ) is generated in the channel. -
IMPROVEMENT OF PLASMA MHD GENERATOR PERFORMANCE BY OPTIMIZATION OF CHANNEL GEOMETRY
Grant number：09305018 1997 - 1999
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
YAMASAKI Hiroyuki, OKAMURA Tetsuji, OKUNO Yoshihiro, KABASHIMA Sigeharu, DEBASIS Biswas, OHGAKI Kumiko
Grant amount：\21400000 （ Direct Cost: \21400000 ）
The objective of present study is an improvement on performance of the plasma MHD generator which is expected to provide very high thermal efficiency.
In fiscal 1997, effects of an area ratio on a relation between the isentropic efficiency and the enthalpy extraction were investigated experimentally and an optimization of the area ratio was also made. As a result, the highest isentropic efficiency was achieved and it was 46.5 %. At the same time, the highest power density of 140 MW/mィイD13ィエD1 was demonstrated. The experiments have indicated that a high isentropic efficiency required for a commercial power plant is possible only for the Disk MHD generator with a small area ratio.
An introduction of an inlet swirl was adopted in fiscal 1998 in order to improve the enthalpy extraction. A new concept was adopted to the design of the swirl vane, and in order to design the swirl vanes, three-dimensional numerical simulation was carried. The simulation indicated that thin swirl vanes are useful to reduce fluid-dynamical loss. In the experiments with the inlet swirl, the enthalpy extraction was improved remarkably and as a result, the highest isentropic efficiency increased up to 54.3 %. This is the highest for the plasma MHD generator.
In fiscal 1999, behavior of flow field and plasma in the MHD generator was investigated and a lot of important data was accumulated. The data have suggested that a large positive swirl and a high Mach number were kept in the MHD generator and this led to the high isentropic efficiency. The present study has encouraged us to proceed to the next step in which an achievement of higher performances than the present ones is a main objective. -
超流動ヘリウム冷却超伝導磁石の高性能化に関する研究
Grant number：08650242 1996
日本学術振興会 科学研究費助成事業 基盤研究(C)
岡村 哲至
Grant amount：\2200000 （ Direct Cost: \2200000 ）
超流動ヘリウム(HeII)流路内で発熱があると、HeII特有のいわゆる内部対流とよばれる熱輸送機構が生じる。現在ではこの内部対流熱輸送機構について、一次元的な特性が明らかにされているのみで、普遍的な流路形状や発熱形態、あるいは流路内で相転移を伴う場合についての特性についてはほとんど明らかにされていない。そこで本研究では、HeII冷却流路内で相転移が生じるような場合も含めて、実験から二次元的な流路内の熱輸送特性を明らかにした。
本実験ではさまざまなHeII冷却流路の形状や姿勢、発熱形態において、流路内の温度分布を計測した。まず極低温で熱伝導率が小さく工作性に優れるFRP(繊維強化プラスティック)によって、模擬冷却流路を制作した。流路断面は矩形とし、断面の縦横長の比が異なるものをいくつか用意した。流路内の一側面には、フィルム状のヒーターを張り付けて発熱部とした。今まであまり着目されなかったHeII流路内熱輸送の二次元性や、相転移後の熱輸送の機構を明らかにできるように、温度計測素子の取り付け位置や熱入力方法について配慮した。
流路内がHeIIで満たされているときは、流路の縦横比が20程度より小さくなると温度分布に2次元性が表れることがわかった。熱入力量が大きく流路内で相転移が生じると、過冷却状態のHeIの自然対流により2次元的な熱輸送となりヒーター表面と流路上部が高温となることがわかった。またこのときのHeIの温度境界層の厚さは、数ミリ程度であることも明らかになった。 -
ファウンテンポンプの閉ループ作動特性に関する研究
Grant number：07750223 1995
日本学術振興会 科学研究費助成事業 奨励研究(A)
岡村 哲至
Grant amount：\1000000 （ Direct Cost: \1000000 ）
本研究ではまず、超流動ヘリウムが循環する閉ループを製作した。閉ループはおもにステンレス管からなり、多孔質フィルターとファウンテンポンプ駆動用電気ヒーター、閉ループ各部の温度と圧力を計測するための数個の温度計と圧力計、ループ内を流れる超流動ヘリウムの流量を計測するための流量計などが取り付けられた。さらに、電気ヒーターからの熱がポンプに有効に使われるように、細いステンレス管を閉ループの一部に組み込んだり、ポンプ駆動に使われた熱を閉ループ外に取り出すための、熱交換器を取り付ける工夫が行われた。
製作されたファウンテンポンプを使って、閉ループ内に超流動ヘリウムを循環させる実験を行い、以下のことが明らかになった。
ファウンテンポンプに供給される熱量を有効に超流動ヘリウムの駆動に使うためには、ポンプの出口に漏洩熱量を低減するための、適切な形状の熱流抑制管が必要である。不必要に長い熱流抑制管を用いると、適切な長さを用いた場合に比べ、そこでの圧力損失が大きくなるために、同じ供給熱量に対して同等の流量を得るためには、ポンプ出口と入口の温度差を大きくすることが必要となる。
径が小さなポーラスプラグを用いた場合は、ある値より大きな熱量を供給すると、プラグ内の流れが超流動乱流状態になり、流量は増加しなくなる。また、径が大きなプラグを用いた場合は、本実験で供給した熱量の範囲では、プラグ内の流れは超流動層流状態であるが、プラグ出口が上昇したことが原因で、ある値以上の流量は得られなかった。このことから、プラグにおいて十分な噴水効果を引き出すためには、プラグ径を大きくしてプラグ内で超流動層流状態を保つことと、プラグ上流の管を太く短くしてプラグ出口温度の上昇を抑えることが有効であることがわかった。 -
超流動ヘリウムチャンネル内での相変化を伴う伝熱特性
Grant number：03750139 1991
日本学術振興会 科学研究費助成事業 奨励研究(A)
岡村 哲至
Grant amount：\900000 （ Direct Cost: \900000 ）
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チャンネル中超流動ヘリウムの非定常熱伝達
Grant number：01750175 1989
日本学術振興会 科学研究費助成事業 奨励研究(A)
岡村 哲至
Grant amount：\900000 （ Direct Cost: \900000 ）
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チャンネル中大気圧超流動ヘリウムの非定常熱伝達特性
Grant number：63750195 1988
日本学術振興会 科学研究費助成事業 奨励研究(A)
岡村 哲至
Grant amount：\800000 （ Direct Cost: \800000 ）
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Study on Heat Transport in Superfluid Helium
Grant type：Competitive
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MHD発電に関する研究
Grant type：Competitive
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Study on MHD Power Generation
Grant type：Competitive
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Study on Stability of Superconducting Magnet
Grant type：Competitive
-
超電導磁石の安定性に関する研究
Grant type：Competitive
-
超流動ヘリウムにおける熱輸送に関する研究
Grant type：Competitive
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