Papers - Imai Ryoji

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