An experimental investigation of sonic transverse jets in Mach 5 cross flow over a flat plate with a sharp leading edge was carried out. Jet to free stream momentum flux ratio, J, was varied from 1.16 to 5.30. Schlieren visualisation provided information regarding mean flow features such as Mach disc height, h, separation length, $x_{sep}$ as well as inherent unsteadiness. Steady wall pressure measurements diagnosed the interaction region between the jet and the incoming cross flow developing on the flat plate. To assess the jet penetration characteristics and trajectories, two-component Particle Image Velocimetry (PIV) measurements were carried out at the centreplane of the flat plate. Raw PIV image analysis was used to specify jet penetration boundaries. Ensemble-averaged streamwise and transverse velocity contours revealed the mean flow structures. The barrel shocks and the Mach disc forming the jet boundary can be easily seen and were visualised/quantified using PIV measurement technique. Maximum turbulence occurred above the Mach disc due to the presence of the shear layer and at the intersection of the windward side of the barrel shock and bow shock.

对马赫数5的横流声波横向射流进行了实验研究，该横流流经具有锋利前缘的平板。射流与自由流的动量通量比J在1.16至5.30之间变化。Schlieren可视化提供了有关平均流量特征的信息，例如马赫盘高度，h，分离长度，$X_{sËp}$以及内在的不稳定 稳定的壁压测量结果诊断出射流与平板上形成的流入横流之间的相互作用区域。为了评估射流的穿透特性和轨迹，在平板的中心平面进行了两组分粒子图像测速（PIV）测量。原始PIV图像分析用于指定射流穿透边界。集合平均的流速和横向速度等值线显示了平均流量结构。使用PIV测量技术可以很容易地看到桶形冲击和形成射流边界的马赫盘，并对其进行可视化/量化。由于剪切层的存在以及发条盒冲击波和弓形冲击波在迎风面的交点处，在马赫盘上方产生了最大的湍流。