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

doi:10.1016/j.ast.2022.107409

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	A numerical study of oblique detonation re-stabilization by expansion waves
	Yao, Kepeng 1,2; Wang, Chun 1,2; Jiang, Zonglin 1,2
刊名	AEROSPACE SCIENCE AND TECHNOLOGY
	2022-03-01
卷号	122 页码:8
关键词	Oblique detonation Stationary Thermal choking Expansion waves
ISSN号	1270-9638
DOI	10.1016/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.
资助项目	National Natural Science Foun-dation of China[11727901]
WOS关键词	OXYGEN MIXTURES ; COMBUSTION ; WEDGE ; INSTABILITY ; PROPULSION ; INITIATION
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
内容类型	期刊论文
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. 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.(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.