叶尖间隙对高负荷风扇转子性能影响的数值研究  

Numerical Investigation of Tip Clearance Effects on the Performance of High Load Fan Rotor

作　　者：蒋永松[1] 王咏梅[1] 陈葆实[1] 

机构地区：[1]沈阳发动机设计研究所,沈阳110015

出　　处：《航空发动机》2006年第4期6-9,共4页Aeroengine

摘　　要：在不同叶尖间隙下,对高负荷风扇转子的特性进行了研究;通过数值方法分析了叶尖间隙对转子特性的影响。结果表明:适当小的叶尖间隙可以使转子获得较好的性能;作为泄漏流的反应,外壁机匣上所形成的静压槽随着间隙的增大、反压的提高而扩大;在不同叶尖间隙下,叶尖附面层和泄漏涡的破裂对风扇转子的失速起不同作用。The influence of tip clearance on the performance of fan rotor has been investigated by numerical method at different clearances. The results show that moderate tip clearance is needed to get better performance. As the reaction of leakage flow, static pressure troughs formed in the outer wall case are enlarged with the increase of clearance and backpressure. For different tip charances, the tip boundary layer and the breakdown of tip leakage vortices play different roles in rotor stall.

关 键 词：泄漏流 风扇转子 性能 叶尖间隙 数值方法 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程]