To investigate the influence of tip winglets on the tip leakage flow in a compressor cascade with different incidences, the experimental measurement combined with numerical simulation are used to study the conventional cascade and cascades with three different pressure surface tip winglets at five incidences of −6°, −3°, 0°, +3° and +6°. The results indicate that three different tip winglets at five incidences all restrain the occurrence of leakage flow, delay the mixing of leakage flow and the mainstream, change the formation path of leakage vortex and weaken its intensity, reduce the flow loss and improve the uniformity of flow field. The sensitivity of the flow field to variable incidences is reduced. The optimization degree of the flow field is proportional to the width of the blade tip winglet. The improvements are more obvious at positive angles. When the incidence reaches +6°, the flow loss is reduced by 12.4%.

为研究叶尖小翼对压气机叶栅在不同入射角时叶尖泄漏流的影响，采用实验测量与数值模拟相结合的方法研究了传统的叶栅和具有三个不同压力面叶尖小翼的叶栅在-6°的五个入射角下的叶栅。 ，−3°，0°，+ 3°和+ 6°。结果表明，三个不同尖顶小翼在五个入射点处均能抑制泄漏流的发生，延迟了泄漏流与主流的混合，改变了泄漏涡的形成路径，减弱了泄漏涡流的强度，减少了流动损失，提高了泄漏均匀性。流场。流场对可变入射的敏感性降低。流场的优化程度与叶尖小翼的宽度成正比。在正角处的改进更加明显。当入射角达到+ 6°时，流量损失减少了12.4％。