Study of the coupling between real gas effects and rarefied effects on hypersonic aerodynamics

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	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)
	2012
会议名称	28th International Symposium on Rarefied Gas Dynamics (RGD)
会议日期	JUL 09-13, 2012
通讯作者邮箱	qsun@imech.ac.cn
会议地点	Zaragoza, SPAIN
关键词	Hypersonic flow Real gas effects Rarefied gas effects Coupling mechanism FLOW
卷号	1501
页码	1515-1521
通讯作者	Chen, S (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
中文摘要	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.
收录类别	CPCI
产权排序	[Chen, Song; Hu, Yuan; Sun, Quanhua] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
会议网址	http://dx.doi.org/10.1063/1.4769718
会议录	28TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS 2012, VOLS. 1 AND 2
会议录出版者	AMER INST PHYSICS
会议录出版地	2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
学科主题	Engineering ; Aerospace; Astronomy & Astrophysics
语种	英语
ISSN号	0094-243X
ISBN号	978-0-7354-1115-9
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/46817]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Chen S,Hu Y,Sun QH. Study of the coupling between real gas effects and rarefied effects on hypersonic aerodynamics[C]. 见:28th International Symposium on Rarefied Gas Dynamics (RGD). Zaragoza, SPAIN. JUL 09-13, 2012.http://dx.doi.org/10.1063/1.4769718.