IMECH-IR  > 高温气体动力学国家重点实验室
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.
Source Publication28TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS 2012, VOLS. 1 AND 2
2012
Pages1493-1499
Conference Name28th International Symposium on Rarefied Gas Dynamics (RGD)
Conference DateJUL 09-13, 2012
Conference PlaceZaragoza, SPAIN
AbstractHypersonic 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.
KeywordHypersonic Flow Flat Plate Bridging Formula Dsmc Method
DepartmentLHD微尺度和非平衡流动
ISBN978-0-7354-1115-9
URL查看原文
Indexed ByCPCI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46812
Collection高温气体动力学国家重点实验室
Corresponding AuthorHu, Y (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Hu Y,Chen S,Sun QH,et al. Hypersonic aerodynamics of a flat plate: bridging formula and wall temperature effects[C]. 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA:AMER INST PHYSICS,2012:1493-1499.
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