Abstract A combined flow control method based on positively bowed blade and endwall vortex generator jet (VGJ) was performed to a compressor cascade under three kinds of inlet conditions. The results show that the endwall VGJ can further decrease the total losses in positively bowed cascades. At 0° incidence with zero inlet boundary layer, the separation type in the positively bowed blade is open, with the VGJ, the loss reduction is 2.7 %. As the inlet boundary layer thickens at 0° incidence, the separation region increases with the separation type keeping unchanged, the loss reduction increasing to 11.73 %. As the incidence rises to +7° with zero inlet boundary layer, the separation type converts into closed and the flow separation is the severest in the three cases, with the VGJ, however, the loss reduction is just 7.4 %, which means that the control effect of endwall VGJ not only depends on the size of separation region but also relies on the type of separation mode. If the separation type is open, as the size of separation region expands, the control effectiveness of endwall VGJ increases; if the separation type converts into closed with the further aggravation of flow field, that control effect will decrease.

中文翻译：

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压缩机级联上正弯曲叶片和涡流发生器射流的组合流量控制

摘要 研究了一种基于正弯叶片和端壁涡流发生器射流（VGJ）的组合流量控制方法，在三种进气工况下对压气机叶栅进行了控制。结果表明，端壁 VGJ 可以进一步降低正弯曲级联的总损失。在零入口边界层的 0°入射角下，正弯叶片中的分离类型是开放的，使用 VGJ，损失减少 2.7%。随着入口边界层在 0°入射角处变厚，分离区域增加，分离类型保持不变，损失减少增加到 11.73%。随着入射角上升到+7°，入口边界层为零，三种情况下分离类型转变为封闭，流动分离最严重，而VGJ，损失减少仅为7.4%，这意味着端壁 VGJ 的控制效果不仅取决于分离区域的大小，还取决于分离模式的类型。如果分离类型为开式，随着分离区域尺寸的扩大，端壁VGJ的控制效果增加；如果随着流场的进一步恶化，分离型转为封闭型，则控制效果会降低。