论文部分内容阅读
为明晰孔式附面层抽吸技术对压气机叶栅气动性能的作用效果,实验研究了在端壁不同位置设置抽吸孔时对大折转角扩压叶栅壁面流谱、出口二次流及损失的影响。研究结果表明,端壁抽吸改变了原型叶栅内部流场结构,角区分离起始点前进行附面层吸除可有效延缓通道涡的形成,降低叶栅损失;分离起始点之后角区分离已经充分发展的位置不宜布置抽吸孔;相比较抽吸槽,采用抽吸孔可以通过更少的抽吸量达到相同程度地对叶栅流动性能的改善。
In order to clarify the effect of hole-type suction on the aerodynamic performance of compressor cascade, the effects of hole suction at different positions of end wall on the wall flow spectrum, outlet secondary flow And the impact of the loss. The results show that the end wall suction changes the flow field structure of the prototype cascade, and the top layer suction before the starting point of corner separation can effectively delay the formation of channel vortices and reduce the loss of cascades. After the starting point of separation, the angular separation Suction holes should not be arranged at locations that have been well developed; as compared to suction slots, the use of suction holes can achieve the same degree of improvement in the flow performance of the cascade with less suction.