| Thermochemical nonequilibrium effects on high-enthalpy double-wedge flows | |
Hong QZ(洪启臻)1,2,3 ; Hao JA1; Uy KCK1; Wen CY1; Sun QH(孙泉华)2,3
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| Corresponding Author | Hao, Jiaao([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
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| 2022-06-01 | |
| Volume | 34Issue:6Pages:14 |
| ISSN | 1070-6631 |
| Abstract | 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 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000808010500002 |
| WOS Keyword | BOUNDARY-LAYER ; COMPRESSION CORNER ; HYPERSONIC FLOW ; SEPARATION ; STABILITY |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | 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] |
| Funding Organization | Hong Kong Research Grants Council ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Hao, Jiaao |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89652 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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.Rp_Au:Hao, Jiaao |
| 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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| Jp2022FA355_2022_The（3968KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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