Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows

doi:10.1063/5.0094929

	Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows
	Hong QZ(洪启臻)1,2,3 ; Hao JA 1; Uy KCK 1; Wen CY 1; Sun QH(孙泉华)2,3
通讯作者	Hao, Jiaao(jiaao.hao@polyu.edu.hk)
发表期刊	PHYSICS OF FLUIDS
	2022-06-01
卷号	34 期号:6 页码:14
ISSN	1070-6631
摘要	A hypersonic laminar flow over double wedges with a fixed forward angle of 15 and varied aft angles is studied using computational fluid dynamics and global stability analysis (GSA) at a free-stream Mach number of 12.82 and a total enthalpy of 21.77 MJ/kg. The specific total enthalpy is high enough to trigger evident vibrational excitation and air chemistry. To assess the effects of thermal and chemical nonequilibrium, three different thermochemistry models of air are considered, including frozen, thermal nonequilibrium, and thermochemical nonequilibrium gases. Two-dimensional base-flow simulations indicate that the onset of incipient and secondary separation is insensitive to the inclusion of thermochemistry, although the size of the separation region is substantially reduced. GSA is then performed on the base flows and identifies a three-dimensional stationary global instability beyond a critical aft angle, which is also insensitive to thermochemical nonequilibrium. The criterion of the global stability boundary established for the supersonic flow over compression corners in a calorically perfect gas in terms of a scaled deflection angle [Hao et al., "Occurrence of global instability in hypersonic compression corner flow, " J. Fluid Mech. 919, A4 (2021)] is, thus, extended to high-enthalpy conditions. Published under an exclusive license by AIP Publishing.
DOI	10.1063/5.0094929
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000808010500002
关键词[WOS]	BOUNDARY-LAYER ; COMPRESSION CORNER ; HYPERSONIC FLOW ; SEPARATION ; STABILITY
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
资助项目	Hong Kong Research Grants Council[15206519] ; Hong Kong Research Grants Council[25203721] ; National Natural Science Foundation of China[12102377] ; National Natural Science Foundation of China[11372325] ; National Natural Science Foundation of China[91116013] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA17030100]
项目资助者	Hong Kong Research Grants Council ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Hao, Jiaao
引用统计	被引频次：8[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/311007/89652
专题	高温气体动力学国家重点实验室
作者单位	1.Hong Kong Polytech Univ, Dept Aeronaut & Aviat Engn, Kowloon, Hong Kong, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hong QZ,Hao JA,Uy KCK,et al. Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows[J]. PHYSICS OF FLUIDS,2022,34,6,:14.
APA	洪启臻,Hao JA,Uy KCK,Wen CY,&孙泉华.(2022).Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows.PHYSICS OF FLUIDS,34(6),14.
MLA	洪启臻,et al."Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows".PHYSICS OF FLUIDS 34.6(2022):14.

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