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Title:
On the transition pattern of the oblique detonation structure
Author: Teng HH(滕宏辉); Jiang ZL(姜宗林)
Source: JOURNAL OF FLUID MECHANICS
Issued Date: 2012-12-25
Volume: 713, Pages:659-669
Abstract: Oblique detonation waves are simulated to study the evolution of their morphology as gasdynamic and chemical parameters are varied. Although two kinds of transition pattern have previously been observed, specifically an abrupt transition and a smooth one, the determining factors for the transition pattern are still unclear. Numerical results show that the transition pattern is influenced by the inflow Mach number, chemical activation energy and heat release. Despite the fact that these parameters were known to influence the detonation instability, the transition pattern variation cannot be predicted according to the instability criterion. In this study, the difference in the oblique shock and detonation angles is proposed as the criterion to determine the transition pattern with the aid of shock-polar analysis. It is found that the smooth transition will appear when the angle difference is small, while the abrupt transition will occur when the difference is large. The shift from the smooth transition to the abrupt transition occurs when the angle difference is about 15 degrees-18 degrees. The previously proposed criterion using the characteristic time ratio is also examined and compared with the present angle difference criterion, and the latter is proved to provide better results.
Keyword: detonations ; reacting flows ; Numerical-Simulation ; Shock-Waves ; Wedge ; Combustion ; Stability
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Teng, HH ; Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Correspondent Email: hhteng@imech.ac.cn
Related URLs: 查看原文
WOS ID: WOS:000311889500027
ISSN: 0022-1120
Rank: [Teng, Hong Hui;Jiang, Zong Lin] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
Subject: 流体力学::空气动力学
Department: LHD激波与爆轰物理
Classification: 一类
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/46618
Appears in Collections:高温气体动力学国家重点实验室_期刊论文

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Recommended Citation:
Teng HH,Jiang ZL. On the transition pattern of the oblique detonation structure[J]. JOURNAL OF FLUID MECHANICS,2012-12-25,713:659-669.
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