Flow visualization experiments, pressure and particle image velocimetry (PIV) measurements were conducted in supersonic internal compression inlet models in a Mach 2 flow. In the first phase of the study, the inlet model having a single sharp-edged shock generator on the upper lip of the inlet was investigated. In the second phase, another ramp was added to the floor of the single-ramp inlet model in order to fully represent an internal compression inlet. A block piece is placed at the exit of the inlet channel to simulate the pressure condition caused by the presence of the diffuser and engine. Schlieren imaging method was used to obtain the multishock wave flow pattern within the models. Fluctuating pressure measurements were performed on the floor of the inlet models. Mean velocity field at the center plane section of the inlet is obtained by side-view PIV measurements. Moreover, mean total and static pressures were measured at the exit section of the models in order to assess the total pressure recovery and exit Mach distribution of the inlet configurations. Results show that in general the double-ramp model flow field exhibits relatively smaller unsteady pressure fluctuations and hence a better performance.

在超音速内部压缩入口模型中以Mach 2流动进行流动可视化实验，压力和粒子图像测速（PIV）测量。在研究的第一阶段，研究了在进气口的上唇上具有单个锋利冲击发生器的进气口模型。在第二阶段中，另一个斜坡被添加到单斜坡入口模型的地板上，以完全代表内部压缩入口。在进气通道的出口放置一块挡块，以模拟由扩散器和发动机的存在引起的压力条件。使用Schlieren成像方法获得了模型内的多冲击波流型。波动压力测量是在入口模型的地板上进行的。入口的中心平面部分的平均速度场是通过侧视图PIV测量获得的。此外，在模型的出口部分测量了平均总压力和静态压力，以评估总压力恢复和入口配置的出口马赫分布。结果表明，总体上，双斜坡模型流场表现出相对较小的不稳定压力波动，因此具有更好的性能。