Hypersonic aerodynamics of a flat plate: bridging formula and wall temperature effects

	Hypersonic aerodynamics of a flat plate: bridging formula and wall temperature effects
	Hu Y(胡远); Chen S(陈松); Sun QH(孙泉华); Hu, Y (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	1493-1499
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 flow over a flat plate is investigated under a wide range of Mach and Knudsen numbers using both continuum-based approach and DSMC method. The simulated gas is argon thus to isolate the high temperature effects. The Mach number of the flow lies between 5 and 30 whereas the Knudsen number covers the entire flow regime. It is learned that local rarefaction is observed near the leading edge even when the Knudsen number is around 0.001. The continuum breakdown can be identified using a nonequilibrium parameter that evaluates the difference among the temperature components. It is also learned that there is competition between viscous effects and rarefied effects on the skin friction. The total drag on the plate can be well estimated using a bridging formula that connects the results from the continuum and free molecular expressions. In addition, the value of drag depends on the surface temperature. The drag coefficient increases with the surface temperature when the Knudsen number is less than 0.01 but decreases when the Knudsen number is larger than 1.0.
关键词	Hypersonic Flow Flat Plate Bridging Formula Dsmc Method
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/311007/46812
专题	高温气体动力学国家重点实验室
通讯作者	Hu, Y (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	Hu Y,Chen S,Sun QH,et al. Hypersonic aerodynamics of a flat plate: bridging formula and wall temperature effects[C]28TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS 2012, VOLS. 1 AND 2,2012:1493-1499.

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