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Imai Ryoji
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Research field 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Fluid engineering
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Thermal engineering
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Frontier Technology (Aerospace Engineering, Marine and Maritime Engineering) / Aerospace engineering
Keywords for Research Field 【 display / non-display 】
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燃料タンク
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冷却
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数値解析
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ロケットエンジン
Graduate school・Graduate course, etc. 【 display / non-display 】
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Osaka University
1989.03，Master's program，Graduate School, Division of Engineering Science，機械工学分野，Completed，Japan
Career 【 display / non-display 】
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㈱IHI 基盤技術研究所 熱流体研究部 主幹研究員（部長待遇）
1989.04 ～ 2014.01
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宇宙開発事業団宇宙環境利用システム本部 副主任開発部員
1996.05 ～ 1998.10
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宇宙開発事業団宇宙環境利用システム本部招聘研究員
1998.11 ～ 1999.03
Academic Society 【 display / non-display 】
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日本混相流学会
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日本航空宇宙学会
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日本マイクログラビティ応用学会
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日本機械学会
Academic prize 【 display / non-display 】
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日本機械学会畠山賞
1987.03，日本機械学会
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日本機械学会技術奨励賞
1993.04，日本機械学会
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日本マイクログラビティ応用学会論文賞
2020.10.12，日本マイクログラビティ応用学会
Books 【 display / non-display 】
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きちんと知りたい！飛行機メカニズムの基礎知識
東野和幸，上羽正純，溝端一秀，今井良二，廣田光智，畠中和明，湊亮二郎，中田大将，樋口健，境昌宏，勝又暢久，日刊工業新聞社，2018.01
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Interdisciplinary Transport Phenomena in the Space Sciences
Kawanami O, Imai R, Azuma H, Ohta H, Honda I and Kawashima Y，Annals of the New York Academy of Sciences，Microgravity Experiment of On-Orbit Fluid Transfer Technique Using Swirl Flow, Interdisciplinary Transport Phenomena in the Space Sciences，2006
Papers 【 display / non-display 】
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Study on the Suppression of Hydrogen Generation by Using Heated Simulated Incineration Ash and Water in an Ash Conveyor Environment
Hideyuki Onodera, Ryoji Imai, Masahiro Sakai，Engineering Proceedings，(p.1 ～ 11)，2026.04
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Study on the Effect of Reactor Scale on Hydrogen Generation from Aluminum Alloy Powder and Water via Stirring
Ryoji Imai, Rina Nishiyama, Yusuke Yamamoto, Masahiro Sakai，Engineering Proceedings，vol.117，(1)，(p.1 ～ 11)，2026.04
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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
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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
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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
International conference proceedings 【 display / non-display 】
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CHARACTERISTICS OF INNER-WALL TEMPERATURE TRANSITION DURING FLOW BOILING IN TRANSPARENT HEATED TUBE SECTION ONBOARD INTERNATIONAL SPACE STATION
Tomoka Takahashi, Naoya Ikeda, Osamu Kawanami, Koichi Inoue, Hitoshi Asano, Ryoji Imai, Satoshi Matsumoto, Koichi Suzuki,Haruhiko Ohta，Proceedings of The 32nd International Symposium on Transport Phenomena，2022.03，online
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Study on break of thermal stratification in container targeted to thermodynamic vent system for future spacecraft
Ryoji Imai, Osamu Kawanami, Yutaka Umemura and Takehiro Himeno，IOP Conference Series: Materials Science and Engineering，vol.502，(1)，(p.1 ～ 5)，2019.03，Oxford,UK
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A STUDY ON NUMERICAL SIMULATION OF ROLLOVER PHENOMENON IN TWO-LAYER DENSITY STRATIFIED FLUID
K.Inaba,R.Imai，Proceedings of 16th INTERNATIONAL HEAT TRANSFER CONFERENCE，(p.3393 ～ 3400)，Article Number:Katsunori Inaba, Ryoji Imai，Begell house Digital Library，2018.08，Beijing,China
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N2O Tank Emptying Characteristics on a Running Rocket Sled
Kazuki Yasuda, Daisuke Nakata, Kugo Okada, Masaharu Uchiumi, Kazuyuki Higashino, Ryoji Imai，AIAA paper，Article Number:AIAA 2018-4596，AIAA，2018.07，Cincinnati,Ohio
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A study on a liquid surface behavior in a rectangular container with cyclic excitation and its numerical solution
FUJIMOTO Takayuki, NAKAKITA Tomofumi, KOBAYASHI Hideo, IMAI Ryoji，The Proceedings of Mechanical Engineering Congress, Japan，vol.2018，(0)，The Japan Society of Mechanical Engineers，2018
Editorial and Commentary 【 display / non-display 】
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Experiences Realated to Multi-phase Flow Research at Industry-goverment-academia Research Institute
今井良二，Japanese Journal of Multiphase Flow，vol.39，(1)，(p.1 ～ 2)，2025.03
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アルミニウム，水高圧水素製造反応の宇宙推進システムへの適用
今井良二，油空圧技術，vol.59，(9)，(p.7 ～ 11)，2020.09
Presentaion at conference, meeting, etc. 【 display / non-display 】
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Experimental and Numerical Study of Rollover in LNG Storage Tanks for Rocket Launches
Ryoji Imai, Takuho Shirayama, Masaharu Uchiumi，The 5th International Electronic Conference on Processes，Proceedings of The 45h International Electronic Conference on Processes，(p.1)，2026.10.20，Switzerland
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Study on Suppression of the Reaction between Incineration Ash and Water Using Heating Temperature and Cooling Temperature Variations
Hideyuki Onodera, Ryoji Imai, Yasuyuki Kikuchi, Suzu Nakao ，The 5th International Electronic Conference on Processes，Proceedings of The 45h International Electronic Conference on Processes，(p.1)，2026.10.20，Switzerland
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宇宙機用推進薬タンクを対象とした，界面相変化を伴う動的濡れ挙動に関する研究
今井 良二、小栗 卓真，第23回HASTIC学術技術講演会，第23回HASTIC学術技術講演会予稿集，2026.09.25，オンライン，Japan
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小型超音速飛行実験機における推進剤管理デバイスに関する研究
今井良二、和田拓也，第23回HASTIC学術技術講演会，第23回HASTIC学術技術講演会予稿集，2026.09.25，オンライン，Japan
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Study on the development of a propellant tank that enables propellant refilling in microgravity (Verification of the gas liquid separation mechanism during liquid filling through a short term microgravity experiment)
Ryoji Imai, Hiroto Shonai，The 1st International Online Conference on Aerospace，MDPI，Proceedings of The 1st International Online Conference on Aerospace，2026.04.16，オンライン，Switzerland
Patent acquisition 【 display / non-display 】
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加圧ガス供給装置とこれを用いた衛星用推進装置
特願2018-012673，特開2019-132142，特許第6995278号
Class subject in charge 【 display / non-display 】
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環境科学（A～Gクラス）
2026，Department
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航空宇宙工学実験
2026，Department
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航空宇宙工学特別講義
2026，Department
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航空宇宙工学とその実用（後半8週）
2026，Department
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宇宙機設計法
2026，Department