IMECH-IR  > 高温气体动力学国家重点实验室
Numerical study of oblique detonation initiations with chain-branching kinetics
Teng HH(滕宏辉); Yang PF(杨鹏飞); Jiang ZL(姜宗林)
Source PublicationAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
2017
Conference NameAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
Conference Date9-13 January 2017
Conference PlaceGrapevine, Texas
Abstract

Oblique detonations induced by semi-infinite wedge are simulated by solving Euler equations with chain branching kinetics. Numerical results show the initiation can be triggered by either the abrupt transition or smooth transition, dependent on incident Ma Minand wedge angle 胃, and then their effects on the oblique detonation angle 尾 and initiation length Liniare analyzed. When 胃 increases, Linidecreases monotonically but 尾 has a minimum value, corresponding to 胃 = 29掳 in this study. When Min decreases, both Liniand 尾 increases monotonically until Mindecreases below certain critical value, Min= 9.2 in this study. Then low inflow Ma effects generate the maximum Lini, with the complex of ODW (oblique detonation wave), SODW (secondary oblique detonation wave) and SIDW (self-ignition deflagration wave). The transient process is observed, demonstrating the structure can self-adjust to find a proper position. The wave structure suggests two wave/heat release process determining the detonation initiation. In the cases with high Minfeatured by SIDW, the oblique-shock induced self-ignition dominates, and Liniincreases when Mindecreases. In the cases with low Minfeatured by SODW, the interaction of ODW and SODW dominates, and Linidecreases when Min decreases. 漏 2017 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

ISBN978-1-62410-463-3
URL查看原文
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/72190
Collection高温气体动力学国家重点实验室
Affiliation1.Institute of Mechanics, Chinese Academy of Sciences, State Key Laboratory of High Temperature Gas Dynamics, No. 15 Beisihuanxi Road, Beijing
2.100190, China
Recommended Citation
GB/T 7714
Teng HH,Yang PF,Jiang ZL. Numerical study of oblique detonation initiations with chain-branching kinetics[C]. USA:American Institute of Aeronautics and Astronautics Inc.,2017.
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