In order to control the SWBLI separation in supersonic cascade and widen its working range, VG array is set on the suction surface and numerically explored. VG can redistribute the passage flow to suppress the separation near the blade wall. Through the analysis on the effects of typical geometry parameters, the chord position of VG trailing edge should be set at the middle position between the blade leading edge and passage shock wave, the height of VG leading edge should be set to nearly 80 % thickness of boundary layer at SWBLI position at near-stall condition, and the array distance of VG should be large as much as possible on the premise of ensuring stable and ordered flow. With the parameter design of VG, at the cost of increasing flow loss from 0.209 to 0.222, the stall margin of cascade is improved from 0.068 to 0.167.

中文翻译：

---

超音速级联中涡流发生器对 SWBLI 的控制


为了控制超声速级联中的SWBLI分离并扩大其工作范围，在吸力面上设置VG阵列并进行数值探索。 VG可以重新分配通道流量以抑制叶片壁附近的分离。通过对典型几何参数的影响分析，VG后缘弦位置应设置在叶片前缘与通道激波的中间位置，VG前缘高度应设置为叶片厚度的近80%。近失速工况下SWBLI位置的边界层，在保证流动稳定有序的前提下，VG的排列距离应尽可能大。通过VG参数设计，以流量损失从0.209增加到0.222为代价，叶栅失速裕度从0.068提高到0.167。