IMECH-IR  > 高温气体动力学国家重点实验室
Initiation structure of oblique detonation waves behind conical shocks
Yang PF(杨鹏飞); Ng, Hoi Dick; Teng HH(滕宏辉); Jiang ZL(姜宗林); Teng, HH (reprint author), Beijing Inst Technol, Sch Aerosp Engn, Dept Mech, Beijing 100081, Peoples R China.
Source PublicationPHYSICS OF FLUIDS
2017-08-01
Volume29Issue:8
ISSN1070-6631
Abstract

The understanding of oblique detonation dynamics has both inherent basic research value for highspeed compressible reacting flow and propulsion application in hypersonic aerospace systems. In this study, the oblique detonation structures formed by semi-infinite cones are investigated numerically by solving the unsteady, two-dimensional axisymmetric Euler equations with a one-step irreversible Arrhenius reaction model. The present simulation results show that a novel wave structure, featured by two distinct points where there is close-coupling between the shock and combustion front, is depicted when either the cone angle or incident Mach number is reduced. This structure is analyzed by examining the variation of the reaction length scale and comparing the flow field with that of planar, wedge-induced oblique detonations. Further simulations are performed to study the effects of chemical length scale and activation energy, which are both found to influence the formation of this novel structure. The initiation mechanism behind the conical shock is discussed to investigate the interplay between the effect of the Taylor-Maccoll flow, front curvature, and energy releases from the chemical reaction in conical oblique detonations. The observed flow fields are interpreted by means of the energetic limit as in the critical regime for initiation of detonation. Published by AIP Publishing.

DOI10.1063/1.4999482
Indexed BySCI ; EI
Language英语
WOS IDWOS:000409227500060
Funding OrganizationThe research is supported by The National Natural Science Foundation of China NSFC (Nos. 91641130, 11372333, and 51376165), and The Natural Sciences and Engineering Research Council of Canada (NSERC).
DepartmentLHD激波与爆轰物理
Classification一类/力学重要期刊
Ranking1
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60942
Collection高温气体动力学国家重点实验室
Corresponding AuthorTeng, HH (reprint author), Beijing Inst Technol, Sch Aerosp Engn, Dept Mech, Beijing 100081, Peoples R China.
Recommended Citation
GB/T 7714
Yang PF,Ng, Hoi Dick,Teng HH,et al. Initiation structure of oblique detonation waves behind conical shocks[J]. PHYSICS OF FLUIDS,2017,29(8).
APA 杨鹏飞,Ng, Hoi Dick,滕宏辉,姜宗林,&Teng, HH .(2017).Initiation structure of oblique detonation waves behind conical shocks.PHYSICS OF FLUIDS,29(8).
MLA 杨鹏飞,et al."Initiation structure of oblique detonation waves behind conical shocks".PHYSICS OF FLUIDS 29.8(2017).
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