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A numerical study of oblique detonation re-stabilization by expansion waves

文献类型：期刊论文

作者Yao, Kepeng1,2; Wang, Chun1,2; Jiang, Zonglin1,2; Jiang ZL(姜宗林); Wang C(王春); Yao KP(姚克鹏)
刊名AEROSPACE SCIENCE AND TECHNOLOGY
出版日期2022-03-01
卷号122页码:8
ISSN号1270-9638
关键词Oblique detonation Stationary Thermal choking Expansion waves
DOI10.1016/j.ast.2022.107409
通讯作者Wang, Chun(wangchun@imech.ac.cn)
英文摘要Oblique detonation engines have significant potential as air-breathing propulsion units because they can undergo self-ignition while providing high combustion efficiency. A key design aspect of such engines is the formation of a stationary oblique detonation wave in the combustor. In the present work, the re-stabilization of oblique detonation by expansion waves induced using a finite wedge was simulated by solving Euler equations in conjunction with an induction-exothermic kinetics model. The numerical results showed that expansion waves interacting with the subsonic region behind the unstable oblique detonation wave can produce a stationary oblique detonation wave on the wedge by eliminating thermal choking. The initiation position was also found to move downstream with decreases in wedge length, while the location of the expansion waves moved upstream. And the critical locations of expansion waves that re-stabilize and initiate an oblique detonation wave were also proposed. A special field structure that comprising two parts separated by unburned gas was observed at the incident Mach number M0 = 7.5 when the expansion waves located near initiation critical location. The upper and lower parts comprised the detonation and deflagration fields, respectively. In others, the interaction of expansion waves leads to a smaller total pressure loss, so that is beneficial to improve the performance of oblique detonation engine in theory. (c) 2022 Elsevier Masson SAS. All rights reserved.
WOS关键词OXYGEN MIXTURES ; COMBUSTION ; WEDGE ; INSTABILITY ; PROPULSION ; INITIATION
资助项目National Natural Science Foun-dation of China[11727901]
WOS研究方向Engineering
语种英语
WOS记录号WOS:000784218400007
资助机构National Natural Science Foun-dation of China
源URL[http://dspace.imech.ac.cn/handle/311007/88988]  
专题力学研究所_高温气体动力学国家重点实验室
通讯作者Wang, Chun
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Yao, Kepeng,Wang, Chun,Jiang, Zonglin,et al. A numerical study of oblique detonation re-stabilization by expansion waves[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2022,122:8.
APA Yao, Kepeng,Wang, Chun,Jiang, Zonglin,姜宗林,王春,&姚克鹏.(2022).A numerical study of oblique detonation re-stabilization by expansion waves.AEROSPACE SCIENCE AND TECHNOLOGY,122,8.
MLA Yao, Kepeng,et al."A numerical study of oblique detonation re-stabilization by expansion waves".AEROSPACE SCIENCE AND TECHNOLOGY 122(2022):8.

入库方式： OAI收割

来源：力学研究所

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