This study experimentally investigated transonic cavity flows with different length-to-depth (L/h) ratios and yaw angles. Two rectangular models with L/h = 6.14 and 21.5 were examined with yaw angles of 10°, 30°, and 45° under a flow of Mach 0.83. The flow was visualized using pressure-sensitive paint (PSP) to obtain the detailed pressure distribution inside the cavity models. The acquired PSP data were compared with experimental data measured using Kulite transducers, and these data showed favorable agreement. Gradual pressure increases inside the cavity model with L/h = 6.14 were observed from the PSP measurements as open cavity flow. The flow impingement at the bottom of the cavity and the significant pressure rise inside the cavity model with L/h = 21.5 were observed as closed cavity flow. The present study quantitatively visualized the evolution of the pressure distribution from symmetric to asymmetric for different yaw angles using porous PSP sensors.

这项研究实验研究了跨音速腔流具有不同的长深比（L / h）和偏航角。在0.83马赫的流量下，以10°，30°和45°的偏航角检查了两个L / h = 6.14和21.5的矩形模型。使用压敏涂料（PSP）对流动进行可视化，以获取空腔模型内部的详细压力分布。将获得的PSP数据与使用Kulite换能器测量的实验数据进行比较，这些数据显示出良好的一致性。L / h时空腔模型内的压力逐渐增加从PSP测量结果中可得出= 6.14，为开腔流动。观察到在腔体底部的流动冲击和腔体模型内部的显着压力升高（L / h = 21.5）作为封闭腔体流动。本研究使用多孔PSP传感器定量地显示了不同偏航角下压力分布从对称到不对称的演变过程。