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

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	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)
	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 Flat plate Bridging formula DSMC method
卷号	1501
页码	1493-1499
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.
中文摘要	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.
收录类别	CPCI
产权排序	[Hu, Yuan; Chen, Song; 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/10.1063/1.4769715
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/311007/46812]
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	Hu Y,Chen S,Sun QH. Hypersonic aerodynamics of a flat plate: bridging formula and wall temperature effects[C]. 见:28th International Symposium on Rarefied Gas Dynamics (RGD). Zaragoza, SPAIN. JUL 09-13, 2012.http://dx.doi.org/10.1063/1.4769715.