带跨音结尾激波的二元收-扩管内附面层控制实验研究

EXPERIMENTAL INVESTIGATION OF BOUNDARY LAYER CONTROL OF TWO-DIMENSIONAL CONVERGENT-DIVERGENT DUCT WITH TERMINAL TRANSONIC SHOCK-WAVE

关键词:  进气道  边界层控制  激波干扰  流场畸变

Key words:  Inlet  Boundary layer control  Shock wave refelction  Flow distortion

摘要:

本文较深入地研究了由直-曲壁构成的二元收-扩管内收敛段底壁的附画层抽气板形状,在吸除系数为1条件下,吸除附面层对几何喉道附近壁画、对跨音结尾激波与扩压器壁附面层干扰区上游的附面层发展的影响;研究了结尾跨音激波与扩压器底壁附面层干扰区的附面层控制对其下游的流场畸变的影响;文中并对有、无附面层控制下的干扰区下游的动态畸变作了比较.指出,通过对干扰区的附面层抽吸,近壁面的紊流度峰值和平均值大大下降.

Abstract:

On condition that CQ =1, the effects of boundary-layer suction in the bottom of convergent region of the two-dimensional convergent-divergent duct on boundary-layer development on the wall near the throat and upstream interaction region between the transonic wave and the boundary-layer are studied in more detail in this paper.The effects of boundary-layer control of the interaction region between the transonic shock-wave and boundary-layer on the bottom wall of the divergent section on the flow distortion of the downstream interaction region are also investigated.The flow dynamic distortion of the downstream interaction region with and without boundary-layer control is presented, and it is pointed out that by means of boundary-layer suction in the interaction region the peak turbulence near the bottom wall and its average value are apparently reduced.