Papers - Imai Ryoji

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  1. Study on Propellant Management Device for Small-Scale Supersonic Flight Experiment Vehicle

    Ryoji Imai, Takuya Wada，Aerospace，vol.12，(6)，(p.1 ～ 24)，2025.06

  2. Mixing-jet Behavior to Agitate the Bulk Liquid in the Cryogenic Propellant Storage Tank (Reduced Gravity Experiment and Estimation of Tip-height of Mixing Jet)

    河南　治，木村　拓己，今井　良二，Japanese Journal of Multiphase Flow，vol.38，(1)，(p.32 ～ 39)，2024.03

  3. Study on Dynamic Wetting and Sloshing Behavior in Microgravity Conditions Targetted to Propellant Tank in the Space Vehicles

    今井　良二，Japanese Journal of Multiphase Flow，vol.38，(1)，(p.24 ～ 31)，2024.03

  4. Two-Phase Flow Loop Experiments Onboard International Space Station

    浅野　等，大田　治彦，河南　治，今井　良二，井上　浩一，鈴木　康一，新本　康久，松本　聡，Japanese Journal of Multiphase Flow，vol.38，(1)，(p.7 ～ 14)，2024.03

  5. Estimation of the tip-height of mixing jet issuing from a nozzle by one-dimensional droplet model

    Osamu Kawanami, Kentaro Takeda, Ryoki Matsushima, Ryoji Imai, Yutaka Umemura, Takehiro Himeno，International Journal of Multiphase Flow，vol.163，(p.1 ～ 9)，2023.06

  6. Study on the Sloshing Behavior under Microgravity Condition Targeted for a Propellant Tank (Dynamic Liquid Behavior in Axially Applied Acceleration)

    Ryoji IMAI, Mori MICHIHARA，International Journal of Microgravity Science and Application，vol.40，(1)，(p.1 ～ 19)，2023.01

  7. Overspeeding characteristics of turbomachinery for gas generator cycle air turbo ramjet engine

    Ryojiro Minato, DaisukeNakata, Masaharu Uchiumi, Ryoji Imai, Kazuyuki Higashino，Propulsion and Power Research，2022.12

  8. Observation of Flow Pattern and Jet-tip Height Issuing from a Nozzle at Tank Bottom in Microgravity

    Osamu KAWANAMI, Kentaro TAKEDA, Ryoki MATSUSHIMA, Ryoji IMAI, Yutaka UMEMURA, Takehiro HIMENO，International Journal of Microgravity Science and Application，vol.39，(2)，(p.1 ～ 13)，2022.05

  9. Study on Propellant Supply System for a Small-scale Supersonic Flight Experiment Vehicle (Study on a Propellant Management Device)

    Naoki SOTA, Ryoji IMAI, Aoki ANADA, Taisei YAMAZAKI, Masaharu UCHIUMI, Daisuke NAKATA, Ryojiro MINATO，International Journal of Microgravity Science and Application，vol.39，(1)，(p.1 ～ 10)，2022.01

  10. Heat Loss Analysis of Flow Boiling Experiments Onboard International Space Station with Unclear Thermal Environmental Conditions (2nd Report: Liquid-vapor Two-phase Flow Conditions at Test Section Inlet)

    Koichi Inoue, Haruhiko Ohta, Hitoshi Asano, Osamu Kawanami, Ryoji Imai, Koichi Suzuki, Yasuhisa Shinmoto, Takashi Kurimoto, Satoshi Matsumoto，Microgravity Science and Technology，2021.08

  11. Heat Loss Analysis of Flow Boiling Experiments Onboard International Space Station with Unclear Thermal Environmental Conditions (1st Report: Subcooled Liquid Flow Conditions at Test Section Inlet)

    Koichi Inoue,Haruhiko Ohta,Yuuki Toyoshima,Hitoshi Asano,Osamu Kawanami,Ryoji Imai,Koichi Suzuki,Yasuhisa Shinmoto,Satoshi Matsumoto，Microgravity Science and Technology，vol.33，(2)，(p.1 ～ 19)，Article Number:28，2021.03

  12. Fundamental Study on Injector Flow Characteristics of Self-Pressurizing Fluid for Small Rocket Engines

    Yasuda Kazuki, Nakata Daisuke, Uchiumi Masaharu, Okada Kugo, Imai Ryoji，JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME，vol.143，(2)，Article Number:021307，2021.02

  13. Ground-Based Experiment on Reducing Boil-Off Gas by Jet Mixing for Future Cryogenic Propulsion System

    Kazuaki NISHIDA, Ryoji IMAI, Osamu KAWANAMI, Yutaka UMEMURA, Takehiro HIMENO，International Journal of Microgravity Science and Application，vol.38，(1)，(p.1 ～ 6)，2021.01

  14. Ground based experiment and numerical calculation on thermodynamic vent system in propellant tank for future cryogenic propulsion system

    Ryoji Imai,Kazuaki Nishida,Osamu Kawanami,Yutaka Umemura,Takehiro Himeno，Cryogenics，vol.109，2020.05

  15. Basic study on thermodynamic vent system in propulsion system for future spacecraft

    Ryoji IMAI, Kazuaki NISHIDA, Osamu KAWANAMI, Yutaka UMEMURA, Takehiro HIMENO，Microgravity Science and Technology，vol.32，(p.339 ～ 348)，2020.01

  16. Study on Propellant Supply System for Small-scale Supersonic Flight Experiment Vehicle (Development of Design Technology for LOX Supply System)

    Yukiya SATO, Ryoji IMAI, Daisuke NAKATA, Ryojiro MINATO, Masaharu UCHIUMI，International Journal of Microgravity Science Application，vol.37，(1)，(p.370104-1 ～ 370104-7)，2020.01

  17. Behavior of Subcooling Jet Injected into a Bulk Liquid in a Tank under Normal- and Micro-gravity Conditions

    O. KAWANAMI, K. TAKEDA, R. NAGUCHI, R. IMAI, Y. UMEMURA, T. HIMENO，International Journal of Microgravity Science Application，vol.36，(4)，(p.1 ～ 8)，2019.10

  18. 推進薬タンクを対象とした微小重力下横スロッシング挙動に関する研究

    道原 孟里，今井良二，International Journal of Microgravity Science Application，vol.36，(4)，(p.1 ～ 10)，2019.10

  19. Study on Liquid Management Technology in Water Tank for Propulsion System Utilizing Aluminum and Water Reaction (Improvement of Liquid Acquisition Performance by Hydrophilic Coating in Metallic Tank)

    Takuya IMAMURA, Masatoshi SUGIOKA, Kazuyuki HIGASHINO, Ryoji IMAI，International Journal of Microgravity Science Application，vol.35，(1)，(p.1 ～ 6)，2018.01

  20. Research on Liquid Management Technology in Water Tank and Reactor for Propulsion System with Hydrogen Production System Utilizing Aluminum and Water Reaction

    Ryoji Imai, Takura Imamura, Masatoshi Sugioka, Kazuyuki Higashino，Microgravity Science and Technology，vol.29，(6)，(p.475 ～ 484)，2017.11

  21. Study on Dynamic Wetting Behavior in Microgravity Condition Targeted for Propellant Tank

    Ryoji IMAI and Mori MICHIHARA，International Journal of Microgravity Science and Application，vol.34，(3)，(p.340306-1 ～ 340306-11)，2017.07

  22. Development of Boiling and Two-Phase Flow Experiments on Board ISS (Dissolved Air Effects on Subcooled Flow Boiling Characteristics)

    K. SAWADA, T. KURIMOTO, A. OKAMOTO, S. MATSUMOTO, H. TAKAOKA,　H. KAWASAKI, M. TAKAYANAGI, Y. SHINMOTO, H. ASANO,　O. KAWANAMI, K. SUZUKI, R. IMAI and H. OHTA，Int.J. Microgravity Sci. Appl，vol.33，(1)，(p.33106-1 - 33106-11 ～ )，2016.01

  23. Development of Boiling and Two-Phase Flow Experiments on Board ISS (Investigation on Performance of Ground Model)

    T. HIROKAWA, D. YAMAMOTO, D. YAMAMOTO, Y. SHINMOTO, H. OHTA, H. ASANO, O. KAWANAMI, K. SUZUKI, R. IMAI, M. TAKAYANAGI, S. MATSUMOTO, Takashi KURIMOTO, H. TAKAOKA, M. SAKAMOTO, K. SAWADA, H. KAWASAKI, K. FUJII, A. OKAMOTO, K. KOGURE, T OKA, T. TOMOBE and K. USUSKU，Int.J. Microgravity Sci. Appl，vol.33，(1)，(p.33105-1 - 33105-9 ～ )，2016.01

  24. Development of Boiling and Two-Phase Flow Experiments on Board ISS (Void Fraction Characteristics in the Observation Section just at the Downstream of the Heating Section)

    T. GOMYO, H. ASANO, H. OHTA, Y. SHINMOTO, O. KAWANAMI, K. SUZUKI, R. IMAI, T. OKA, T. TOMOBE, K. USUKU, M. SHIMADA, S. MATSUMOTO, T. KURIMOTO, H. TAKAOKA, M. SAKAMOTO, H. KAWASAKI and K. SAWADA，Int.J. Microgravity Sci. Appl，vol.33，(1)，(p.330104-1 - 330104-10 ～ )，2016.01

  25. Development of Boiling and Two-Phase Flow Experiments on Board ISS (Research Objectives and Concept of Experimental Setup)

    H. OHTA, H. ASANO, O. KAWANAMI, K. SUZUKI, R. IMAI, Y. SHINMOTO, S. MATSUMOTO, T. KURIMOTO, H. TAKAOKA, K. FUJII, M. SAKAMOTO, K. SAWADA, H. KAWASAKI, A. OKAMOTO, K. KOGURE, T. OKA, K. USUKU, T. TOMOBE and M. TAKAYANAGI，Int.J. Microgravity Sci. Appl，vol.33，(1)，(p.330102-1 - 330102-11 ～ )，2016.01

  26. Development of Boiling and Two-phase Flow Experiments on board ISS (Condensation Section)

    R. IMAI, K. SUZUKI, H. KAWASAKI, H. OHTA, Y. SHINMOTO, H. ASANO, O. KAWANAMI, S. MATSUMOTO, T. KURIMOTO, H. TAKAOKA, M. SAKAMOTO, K. USUKU, K. SAWADA，Int.J. Microgravity Sci. Appl，vol.33，(1)，(p.330103-1 - 330103-5 ～ )，2016.01

  27. Development of Boiling and Two-Phase Flow Experiments on Board ISS (Temperature Data Derivation and Image Analysis of a Transparent Heated Short Tubein the Glass Heated Section)

    M. OKUBO, O. KAWANAMI, K. NAKAMOTO, H. ASANO, H. OHTA, Y. SHINMOTO, K. SUZUKI, R. IMAI, S. MATSUMOTO, T. KURIMOTO, M. SAKAMOTO, H. TAKAOKA, K. SAWADA, A. OKAMOTO, H. KAWASAKI, M. TAKAYANAGI and K. FUJII，Int.J. Microgravity Sci. Appl，vol.33，(1)，(p.33107-1 - 33107-7 ～ )，2016.01

  28. Aerodynamic levitator for large-sized glassy material production

    S. YODA, W. CHO, R. IMAI，Review of Scientific Instruments，vol.86，(9)，(p.093906-1 - 093906-5 ～ )，2015.09

  29. Recent Progress in JAXA Project of Boiling Two-Phase Flow Experiment onboard ISS

    Fujii K, Komasaki M, Kurimoto T, Kawasaki H, Sawada K, Suzuki K, Asano H, Kawanami O, Imai R, Shinmoto Y and Ohta H，Journal of Physical Science and Application，vol.2，(4)，(p.71 ～ 79)，2012.04

  30. ロケット推薬タンク気相内部熱流動解析および評価試験

    今井良二, 亀谷雄樹, 杉紀夫, 井上琢磨, 石崎真一郎, 藤田真澄, 久保田勲，混相流，vol.25，(5)，(p.487 ～ 493)，2012.03

  31. Proposal of experimental setup on boiling two-phase flow on-orbit experiments onboard Japanese experiment module "KIBO"

    Baba S, Sakai T, Sawada K, Kubota C, Wada Y, Shinmoto Y, OutaH, Asano H, Kawanami O, Suzuki K, Imai R, Kawasaki H, Fujii K, Takayanagi K and Yoda S，Journal of Physics: Conference Series，vol.327，(012055)，(p.1 ～ 12)，2011.12

  32. Thermal Control System for Space Experiment on Two-Phase Boiling Flow -II ; Manufacture and Test of the Condenser system

    Suzuki K, Imai R, Hong C, Kawasaki H, Ishizuka H, Fujii F, Shinmoto Y and Ohta H，vol.28，(2)，(p.S112-S114 ～ )，2011.07

  33. Thermal Control System for Space Experiment on Two-Phase Boiling Flow -I ; Analysis and Design of condenser

    Imai R, Susuki K, Kawasaki H, Hong C, Ishizuka H, Fujii K, Shinmoto Y and Ohta H，Journal of The Japan Society of Microgravity Application，vol.28，(2)，(p.S109-S111 ～ )，2011.07

  34. Basic study on heat rejection system using high heat flux micro channel evaporator

    Imai R Tsukamoto T，Microgravity Science and Technology，vol.19，(Issue3-4)，(p.30 ～ 32)，2007.10

  35. DEVELOPMENT AND RESULTS OF SPACE EVALUATION TEST FOR VANE TYPE TANK SYSTEM (VTS)

    Imai R, Takano Y, Yamada K, Hama K, Nakamura S，Proceedings of the Twenty-Fifth International Symposium on Space Technology and Science selected papers，vol.25，(p.1 ～ 5)，2006.12

  36. Thermal characteristics of the high heat flux micro-evaporator

    Tsukamoto T, Imai R，Experimental Thermal and Fluid Science，vol.30，(Issue 8)，(p.837 ～ 842)，2006.08

  37. On-orbit Cryogenic Fluid Transfer Technique Using Swirl Flow Combined with Condensation by Spray Cooling: Preliminary Study of Microgravity Experiment and Thermal Analysis in Refilling Process

    Kawanami O, Azuma H, Imai R, Ohta H，日本マイクログラビティ応用学会誌，vol.21，(2)，(p.174 ～ 186)，2004.04

  38. マイクロチャンネルの熱流体

    矢野　歳和・今井　良二・磯村　浩介，ながれ，vol.21，(1)，(p.55 ～ 61)，2002.02

  39. 、三色照明光を用いたPTV法による三次元流速測定技術の開発

    菅原弘之，森　貞雄，依田真一，今井良二，大津誠，高草木常彦，渡部成夫，可視化情報学会誌，vol.20，(78)，(p.235 ～ 242)，2000.07

  40. 微小重力下における水のサブクールプール沸騰 気泡挙動とバーンアウトの観察

    鈴木康一、河村洋、青山康明、小山正人、川崎晴彦、今井良二，日本マイクログラビティ応用学会誌，vol.15，(4)，(p.206 ～ 212)，1998.10

  41. 微小重力環境用遠心力利用気泡除去装置に関する研究

    今井良二, 矢野歳和，日本機械学会論文集 B，vol.63，(611)，(p.2296 ～ 2302)，1997.07

  42. 微小重力条件下の三次元形状ベーン形表面張力タンク内の流体挙動

    今井良二, 矢野歳和，日本機械学会論文集 B，vol.61，(586)，(p.2081 ～ 2087)，1995.06

  43. 静電気力を利用した気泡移送

    今井良二, 矢野歳和，日本機械学会論文集 B，vol.60，(580)，(p.3979 ～ 3986)，1994.12

  44. 微小重力条件下の二次元べーン形表面張力タンクの流体挙動

    今井 良二, 矢野 歳和, 塩冶 震太郎，日本機械学会論文集 B，vol.60，(572)，(p.1242 ～ 1249)，1994.04

  45. 特異点法を用いた遠心羽根車内におけるキャビテーション流れの非線形解析

    今井 良二, 辻本 良信, 古屋 興二，日本機械学会論文集 B，vol.56，(522)，(p.454 ～ 459)，1990.02

  46. 遠心羽根車内におけるはく離流れの特異点法による解析と,これを用いた羽根出口端削除による性能変化の考察

    今井 良二, 辻本 良信 , Allan J. Acosta，日本機械学会論文集 B，vol.55，(512)，(p.1129 ～ 1136)，1989.04

  47. 遠心羽根車内におけるはく離流れの自由流線理論による解析

    辻本 良信 , Allan J. Acosta, 今井 良二，日本機械学会論文集 B，vol.54，(499)，(p.583 ～ 588)，1988.03

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