平板上直立圆柱引起的三维湍流分离流的传热特性

 1.实验目的与方法 航天飞行器再入大气层时,其表面突出物引起的三维湍流分离,使局部热流急剧增加。突出物激波与湍流边界层的干扰流场很复杂,需要较多的测量数据揭示其流动规律。为此,在激波风洞中Ma_1=5.2,Re/L=2.3×10~7m~(-1)的气流条件下,测量了平板上直立圆柱干扰区中柱前缘及其邻近平板上的热流分布,并拍摄了激光纹影

HEATING CHARACTERISTICS IN TUREULENT SEPARATED FLOW CAUSED BY A CYLINDER NORMAL TO A FLAT PLATE

An experimental study was conducted on interference heating characteristics caused by a long cylinder normal to a flat plate in shock tunnel at a Mach number of 6.2 and unite Reynolds number of 2.3×10~7/m. Detailed heating distributions were measured on both the cylinder and the plate near it. Analysis of the heating distributions in conjunction with the visualized flowfleld indicates that the multiple-peaked shape of the heating distribution in the symmetric plane of the separation region is related to the multiple vortex configuration. Heating peaks occur at attachment points and low heating spots correspond to separation points. Approximate methods are given for determining the angle of the separation shock wave, the deflected angle of the flow behind the separation shock wave, the peak values and their lbca-. tions on both the cylinder and the plate.The results are found to be in reasonable agreement with data from other investigators for a wide range of flow conditions.