【摘要】 采用数值方法对自循环机匣处理改善兼有堵塞和过载型失速转子的稳定性进行了研究。研究发现对于叶顶流场由叶顶泄漏流和吸力面流动分离共同恶化的转子，自循环机匣处理只有同时兼顾对吸力面流动分离和叶顶泄漏流诱发的低速流动区域进行抑制，其扩稳效果才显著。其中当抽吸位置覆盖叶片通道中堵塞最严重的区域时，扩稳效果最佳，转子的失速裕度改进量高达12.86%。扩稳机制的研究发现，自循环机匣处理的喷气效应可以改善叶顶进气条件，并对叶顶泄漏流进行抑制；而抽吸效应则可以抽吸叶顶区域的低速流动区，在喷气效应和抽吸效应的共同作用下，叶顶泄漏涡的破碎和吸力面的流动分离被抑制，叶顶流通状况得到改善而使得转子的气动稳定性得到提升。更多还原

【Abstract】 This work used numerical methods to study on improving the stability of a rotor with both blocked and overloaded type stall by the self-circulating casing treatment(SCT). The study found that for the rotor whose tip flow field was aggravated by the low velocity flow zone induced by tip leakage flow and the suction surface flow separation, the SCT can only achieve significant enhancing stability effect by simultaneously considering its suction effect and jet effect, that is,suppressing both the low velocity flow zone induced by tip leakage flow and suction surface flow separation. When the suction position covers the most blockage zone in the blade passage, the enhancing stability effect of the SCT is the best, and the stall margin improvement of the rotor is as high as 12.86%. The study on the mechanism of enhancing stability found that, the jet effect of the SCT can improve the inlet condition of blade tip and restrain the tip leakage flow,the suction effect can suction the low velocity flow zone. Under the combined action of jet effect and suction effect, the breakdown of tip leakage vortex and flow separation of suction surface are inhibited, and the blade tip flow condition is improved, thus the aerodynamic stability of rotor is improved.更多还原