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Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows

文献类型：期刊论文

作者Hong, Qizhen1,2,3; Hao, Jiaao3; Uy, Ken Chun Kit3; Wen, Chih-Yung3; Sun, Quanhua1,2; Sun QH(孙泉华); Hong QZ(洪启臻)
刊名PHYSICS OF FLUIDS
出版日期2022-06-01
卷号34期号:6页码:14
ISSN号1070-6631
DOI10.1063/5.0094929
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.
WOS关键词BOUNDARY-LAYER ; COMPRESSION CORNER ; HYPERSONIC FLOW ; SEPARATION ; STABILITY
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
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.,...&洪启臻.(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.

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来源：力学研究所

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