Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures

doi:10.1016/j.ast.2019.06.031

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	Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures
	Fang YS(方宜申); Zhang ZJ(张子健); Hu ZM(胡宗民); Deng, X
刊名	AEROSPACE SCIENCE AND TECHNOLOGY
	2019-09-01
卷号	92 页码:676-684
关键词	Oblique detonation wave Blunt wedge Initiation Hydrogen
ISSN号	1270-9638
DOI	10.1016/j.ast.2019.06.031
通讯作者	Hu, Zongmin(huzm@imech.ac.cn)
英文摘要	Two-dimensional, oblique detonation waves (ODWs) in a stoichiometric hydrogen-air mixture are simulated with the reactive Euler equations using a detailed chemical reaction model. This study focuses on blunt wedge induced ODWs, which are not only influenced by inflow parameters but also the size of the blunt body. With the inflow parameters of flight altitude of 30 km and flight Mach number M-0 of 8-10, the numerical results demonstrate that the blunt wedge is crucial to initiate the ODW. In the case of M-0 = 10, the straight wedge without the blunt forebody can initiate the detonation. However, decreasing M-0 causes the failure of initiation, which can be compensated by increasing the radius R-0 of the blunt forebody. By adjusting R-0, two initiation procedures are observed and distinguished: one is the wedge-induced initiation and the other is the blunt forebody-induced initiation. Although both have been independently studied before, in this study, their coexistence is demonstrated, and the mechanism is analyzed for the first time. A theoretical analysis based on the classic initiation theory is performed to elucidate the initiation mechanism, giving a good agreement between the critical radius with numerical results. (C) 2019 Elsevier Masson SAS. All rights reserved.
分类号	一类
资助项目	Natural Science Foundation of China[11672308] ; Natural Science Foundation of China[11532014]
WOS关键词	TRANSITION ; SIMULATIONS
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000485852600056
资助机构	Natural Science Foundation of China
其他责任者	Hu, Zongmin
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/79985]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Fang YS,Zhang ZJ,Hu ZM,et al. Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2019,92:676-684.
APA	方宜申,张子健,胡宗民,&Deng, X.(2019).Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures.AEROSPACE SCIENCE AND TECHNOLOGY,92,676-684.
MLA	方宜申,et al."Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures".AEROSPACE SCIENCE AND TECHNOLOGY 92(2019):676-684.