| 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.
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| Source Publication | 28TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS 2012, VOLS. 1 AND 2 |
| 2012 | |
| Pages | 1515-1521 |
| Conference Name | 28th International Symposium on Rarefied Gas Dynamics (RGD) |
| Conference Date | JUL 09-13, 2012 |
| Conference Place | Zaragoza, SPAIN |
| Abstract | Hypersonic 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. |
| Keyword | Hypersonic Flow Real Gas Effects Rarefied Gas Effects Coupling Mechanism Flow |
| Department | LHD微尺度和非平衡流动 |
| ISBN | 978-0-7354-1115-9 |
| URL | 查看原文 |
| Indexed By | CPCI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46817 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | Chen, 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]28TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS 2012, VOLS. 1 AND 2,2012:1515-1521. |
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