Studies on Control of Shock-Induced Separation Using Nonequilibrium Condensation

采用实验和数值模拟相结合的方法，研究了湿空气在超音速喷管和跨音速圆形冲击模型喷管中的膨胀凝结对激波流场的影响。结果发现，在有凝结的情况下，激波后的湍流和边界层厚度比没有凝结时要小。此外，冷凝对激波相对于激波相对于冷凝区的位置有很大影响，对于不同的初始过饱和度，非平衡冷凝区的位置与激波的位置之间的关系有三种模式。这些事实表明，非平衡凝聚是抑制激波诱导分离的有效方法。

The effects of condensation produced by the expansion of moist air in a supersonic nozzle and in transonic nozzle with circular bump model on the flow fields with shock wave were investigated experimentally and numerically. As a result, it is found that in case with condensation, the turbulence and boundary layr thickness behind shock waves become small in comparison with without condensation. Furthermore, condensation influences strongly the position of the shock wave relative to the shock wave relative to the condensation zone and there are three patterns for the relation between the location of the nonequilibrium condensation zone and shock waves for different initial degrees of supersaturation. These facts means that the nonequibrium condensation is an effective method to suppress the shock-induced separation.