物理学报Issue(5)：1-9,9.DOI:10.7498/aps.64.054706
二维高超声速后台阶表面传热特性实验研究∗
Exp erimental investigation on surface heat transfer characteristics of hyp ersonic two-dimensional rearward-facing step flow
摘要
Abstract
Hypersonic rearward-facing step flow is one of the basic flow problems in the design of engine for endo-atmospheric hypersonic vehicle, including thermal protection, and aero-optical correction for infrared imaging window of hypersonic interceptors, etc. To know the characteristics of hypersonic rearward-facing step flow is of vital importance in improving the performances of vehicles, and understanding the basis of the flow. This paper investigates the characteristics of a two-dimensional hypersonic rearward-facing step flow, measures the surface heat transfer coefficient and the surface static pressure downstream the step, and compares the results with the values predicted using the hypersonic boundary layer theory. And the results are demonstrated by the flow structure visualization using NPLS (nano-based planar laser scattering) technique. It is concluded that for the hypersonic two-dimensional rearward-facing step flow, the surface heat transfer distribution can be determined directly by the boundary layer edge parameters at the step;and the viscous effect dominates the flow characteristic in the separation and reattachment region; whole in the far-field region downstream the step, the heat transfer coefficient approaches an asymptotic value that may be equal to the turbulent flat plate value. Furthermore, the boundary layer structure may depend on the ratio of boundary layer thickness to the height of step. It is concluded that, when studying the problem of hypersonic rearward-facing step using CFD (computational fluid dynamics) technology, choosing an appropriate turbulent model is needed.关键词
高超声速/后台阶/传热/实验Key words
hypersonic/rearward-facing step/heat transfer/experiment引用本文复制引用
王小虎,易仕和,付佳,陆小革,何霖..二维高超声速后台阶表面传热特性实验研究∗[J].物理学报,2015,(5):1-9,9.基金项目
国家自然科学基金(批准号:11172326,11302256),国防科技大学科研计划(批准号:0100010112001)资助的课题.@@@@* Project supported by the National Natural Science Foundation of China (Grant Nos.11172326,11302256), and the Science Research Program of National University of Defense Technology, China (Grant No.0100010112001) （批准号:11172326,11302256）
