Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows

doi:10.1063/5.0094929

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows
	Hong, Qizhen 1,2,3; Hao, Jiaao 3; Uy, Ken Chun Kit 3; Wen, Chih-Yung 3; Sun, Quanhua 1,2
刊名	PHYSICS OF FLUIDS
	2022-06-01
卷号	34 期号:6 页码:14
ISSN号	1070-6631
DOI	10.1063/5.0094929
通讯作者	Hao, Jiaao(jiaao.hao@polyu.edu.hk)
英文摘要	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.
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]
WOS关键词	BOUNDARY-LAYER ; COMPRESSION CORNER ; HYPERSONIC FLOW ; SEPARATION ; STABILITY
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:000808010500002
资助机构	Hong Kong Research Grants Council ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89651]
专题	力学研究所_高温气体动力学国家重点实验室
通讯作者	Hao, Jiaao
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 3.Hong Kong Polytech Univ, Dept Aeronaut & Aviat Engn, Kowloon, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Hong, Qizhen,Hao, Jiaao,Uy, Ken Chun Kit,et al. Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows[J]. PHYSICS OF FLUIDS,2022,34(6):14.
APA	Hong, Qizhen,Hao, Jiaao,Uy, Ken Chun Kit,Wen, Chih-Yung,&Sun, Quanhua.(2022).Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows.PHYSICS OF FLUIDS,34(6),14.
MLA	Hong, Qizhen,et al."Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows".PHYSICS OF FLUIDS 34.6(2022):14.