The effects of crossflow on the interaction between an impinging shock wave and a high-speed turbulent boundary layer are investigated using direct numerical simulations of statistically two-dimensional, three-component flow. The leading-order effect of crossflow is increased size and strength of the separation bubble, with upstream and downstream displacement of the separation and reattachment points, respectively. This effect is traced to retarded growth of the shear layer surrounding the separation bubble, with associated reduction of the turbulent shear stress. Genuinely, three-dimensional effects are observed in the interaction and in the downstream recovery zone, with mean flow direction changing both in the longitudinal and wall-normal directions. Three-dimensional, non-equilibrium effects yield substantial misalignment between turbulent stresses and mean strain rate, thus providing a challenging benchmark for the development and validation of turbulence models for compressible flows.

横流对冲击波和高速湍流边界层之间的相互作用的影响使用统计二维、三分量流的直接数值模拟进行了研究。横流的先导效应是分离气泡的尺寸和强度增加，分离点和再附着点分别在上游和下游发生位移。这种效应被追溯到分离气泡周围的剪切层的生长延迟，伴随着湍流剪切应力的降低。实际上，在相互作用和下游回收区中观察到了三维效应，平均流动方向在纵向和壁法向都发生了变化。三维，