IMECH-IR  > 高温气体动力学国家重点实验室
Study of the coupling between real gas effects and rarefied effects on hypersonic aerodynamics
Chen S(陈松); Hu Y(胡远); Sun QH(孙泉华); Chen, S (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Source Publication28TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS 2012, VOLS. 1 AND 2
2012
Pages1515-1521
Conference Name28th International Symposium on Rarefied Gas Dynamics (RGD)
Conference DateJUL 09-13, 2012
Conference PlaceZaragoza, SPAIN
AbstractHypersonic vehicles travel across the atmosphere at very high speed, and the surrounding gas experiences complicated physical and chemical processes. These processes produce real gas effects at high temperature and rarefied gas effects at high altitude where the two effects are coupled through molecular collisions. In this study, we aim to identify the individual real gas and rarefied gas effects by simulating hypersonic flow over a 2D cylinder, a sphere and a blunted cone using a continuum-based CFD approach and the direct simulation Monte Carlo method. It is found that physical processes such as vibrational excitation and chemical reaction will reduce significantly the shock stand-off distance and flow temperature for flows having small Knudsen number. The calculated skin friction and surface heat flux will decrease when the real gas effects are considered in simulations. The trend, however, gets weakened as the Knudsen number increases. It is concluded that the rarefied gas effects weaken the real gas effects on hypersonic flows.
KeywordHypersonic Flow Real Gas Effects Rarefied Gas Effects Coupling Mechanism Flow
DepartmentLHD微尺度和非平衡流动
ISBN978-0-7354-1115-9
URL查看原文
Indexed ByCPCI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46817
Collection高温气体动力学国家重点实验室
Corresponding AuthorChen, S (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Chen S,Hu Y,Sun QH,et al. Study of the coupling between real gas effects and rarefied effects on hypersonic aerodynamics[C]. 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA:AMER INST PHYSICS,2012:1515-1521.
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