JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
Other TitleAn Experimental Investigation of the Effect of Inner Cylinder on the Performance of a Rotating Detonation Rocket Engine
Author(jpn)川﨑, 央; 笠原, 次郎; 稲川, 智也; 松岡, 健; 川島, 秀人; 松尾, 亜紀子; 船木, 一幸
Author(eng)Kawasaki, Akira; Kasahara, Jiro; Inakawa, Tomoya; Matsuoka, Ken; Kawashima, Hideto; Matsuo, Akiko; Funaki, Ikko
Author Affiliation(jpn)名古屋大学; 名古屋大学; 名古屋大学; 名古屋大学; 宇宙航空研究開発機構研究開発部門(JAXA); 慶應義塾大学; 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)
Author Affiliation(eng)Nagoya University; Nagoya University; Nagoya University; Nagoya University; Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA); Keio University; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)
Issue Date2019-02-25
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料: 第50回流体力学講演会/第36回航空宇宙数値シミュレーション技術シンポジウム論文集
JAXA Special Publication: Proceedings of the 50th Fluid Dynamics Conference / the 36th Aerospace Numerical Simulation Symposium
Start page91
End page95
Publication date2019-02-25
AbstractIn this study, an inner-cylinder-replaceable rotating detonation rocket engine is tested in a vacuum environment for various inner-cylinder radii r(sub i) ranging from 31 mm (typical lab scale) to 0 mm (no inner cylinder). As a result, it was clarified that there exists a critical inner-cylinder radius to sustain adequate thrust performance in the engine. Detonation waves attached to the inner-cylinder wall for r(sub i) = 23 and 31 mm (supercritical cases), whereas detachment of detonation waves from the inner-cylinder wall was observed for r(sub i) = 0 and 9 mm (subcritical cases), and 15 mm (critical case). In the cases of r(sub i) = 0, 9 mm (subcritical), and 15 mm (critical), strong chemical luminescence was observed significantly in the exhaust plume. For r(sub i) = 15 mm (critical cases), and 23 and 31 mm (supercritical cases), the measured specific impulses were greater than 80% of theoretical values. However, for r(sub i) = 0 and 9 mm (subcritical cases), the measured specific impulses were below 80% of the theoretical values. This is to be attributed to the imperfect detonation combustion observed significantly in the subcritical cases. From these results, we have concluded that the inner-cylinder radius is, at 15 mm, close to the critical condition to keep rotating detonation waves in a favorable state in the combustor.
Description会議情報: 第50回流体力学講演会/第36回航空宇宙数値シミュレーション技術シンポジウム (2018年7月4日-6日. 宮崎市民プラザ), 宮崎市, 宮崎
形態: カラー図版あり
Meeting Information: 50th Fluid Dynamics Conference /the 36th Aerospace Numerical Simulation Symposium (July 4-6, 2018. Miyazaki Citizen's Plaza), Miyazaki, Japan
Physical characteristics: Original contains color illustrations
Document TypeConference Paper
JAXA Category特別資料
NASA Subject CategoryFluid Mechanics and Thermodynamics
Report NoJAXA-SP-18-005

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