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

doi:10.1016/j.ast.2022.107409

	A numerical study of oblique detonation re-stabilization by expansion waves
	Yao KP(姚克鹏)1,2 ; Wang C(王春)1,2 ; Jiang ZL(姜宗林)1,2
通讯作者	Wang, Chun(wangchun@imech.ac.cn)
发表期刊	AEROSPACE SCIENCE AND TECHNOLOGY
	2022-03-01
卷号	122 页码:8
ISSN	1270-9638
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.
关键词	Oblique detonation Stationary Thermal choking Expansion waves
DOI	10.1016/j.ast.2022.107409
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000784218400007
关键词[WOS]	OXYGEN MIXTURES ; COMBUSTION ; WEDGE ; INSTABILITY ; PROPULSION ; INITIATION
WOS研究方向	Engineering
WOS类目	Engineering, Aerospace
资助项目	National Natural Science Foun-dation of China[11727901]
项目资助者	National Natural Science Foun-dation of China
论文分区	一类
力学所作者排名	1
RpAuthor	Wang, Chun
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/88989
专题	高温气体动力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yao KP,Wang C,Jiang ZL. A numerical study of oblique detonation re-stabilization by expansion waves[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2022,122:8.
APA	姚克鹏,王春,&姜宗林.(2022).A numerical study of oblique detonation re-stabilization by expansion waves.AEROSPACE SCIENCE AND TECHNOLOGY,122,8.
MLA	姚克鹏,et al."A numerical study of oblique detonation re-stabilization by expansion waves".AEROSPACE SCIENCE AND TECHNOLOGY 122(2022):8.

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