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

	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.
会议录名称	28TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS 2012, VOLS. 1 AND 2
	2012
页码	1515-1521
会议名称	28th International Symposium on Rarefied Gas Dynamics (RGD)
会议日期	JUL 09-13, 2012
会议地点	Zaragoza, SPAIN
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.
关键词	Hypersonic Flow Real Gas Effects Rarefied Gas Effects Coupling Mechanism Flow
课题组名称	LHD微尺度和非平衡流动
ISBN号	978-0-7354-1115-9
URL	查看原文
收录类别	CPCI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46817
专题	高温气体动力学国家重点实验室
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.
推荐引用方式 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.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
j01307273.pdf（465KB）			开放获取	--	浏览下载