中文摘要：

跨声速离心压气机间隙泄漏涡与激波相互干涉对压气机性能有重要影响.采用CFD方法对设计的跨声速离心压气机进行数值模拟,分析了激波与间隙泄漏涡的相互作用,研究了自循环机匣处理开缝位置对激波/间隙泄漏涡干涉的影响.结果表明：导风轮叶尖泄漏涡与激波干涉是压气机失速的重要诱因;机匣处理开缝位于分流叶片附近可扩大堵塞流量,开缝位于主叶片前缘附近可改善小流量时压气机特性;较大气体回流量可增加叶轮进口轮缘附近气流的正预旋,降低叶轮进口相对马赫数,减弱流道激波和叶尖泄漏涡;流经机匣处理槽的气流量较小时,具有微喷气或吸气效应,能抑制间隙泄漏涡,推迟压气机失稳.

英文摘要：

The interaction of shock wave and tip leakage greatly affects the performance of transonic centrifugal compressor.Numerical simulation was carried out for the designed transonic centrifugal compressor and the interaction of shock wave/tip leakage was analyzed.Impacts of different casing treatment bleeding locations on shock wave/tip leakage interaction were investigated.The simulation shows that the interaction of tip leakage with shock wave near inducer contributes a lot to the compressor instability.The casing treatment bleeding slot locating near splitter blade could improve choke flow while the bleeding slot locating near main blade leading edge could improve compressor performance near surge.Recirculation flow through casing treatment could add positive pre-swirl into the impeller inflow and reduce the interaction of shock wave and tip leakage.Little flow through the casing treatment,similar effect as micro injection or bleeding,could suppress the tip leakage and delay surge of compressor.