壁面吸气抑制分离减少流动损失的研究

研究了斜流压气机具有大尺度分离的导向叶栅内的流场结构;通过对壁面不同吸气位置与吸气量对流场结构及损失的影响分析,并借助于拓扑分析的手段,探讨了针对于大尺度分离结构条件下吸气点位置的选择原则,总结出了端壁与吸力面吸气位置与分离结构之间的对应关系。

THE RESEARCH ABOUT LOSS REDUCTION AND SEPARATION SUPPRESS BY WALL SUCTION

The flow structure in a compressor cascade with large separation was studied. The meridianal divergence angle was the main factor to induce the separation in compressor stator, and the separation is three dimensional on the corner which can not be suppressed by suction side boundary layer suction. The influence about boundary layer suction location and suction mass flow rate on the flow structure especially the separation structure was also studied. Based on flow topology theory, the principle to chose boundary layer suction location in a flow with large corner separation was suggested, and the relation between separation structure and boundary layer suction was also summarized.