论文部分内容阅读
采用时间精确求解方法对某高负荷跨声速轴流压气机转子在98%设计转速下的叶尖非定常流场进行了数值研究.结果显示,激波自身振荡不明显,叶尖区域流动的非定常性主要来源于叶尖泄漏涡的破碎及其与激波之间的相互干涉.对比设计状态与失速状态下叶尖泄漏涡的特点发现:在近失速点时,叶尖区域间歇性出现前缘溢流.分析表明:叶尖泄漏涡在激波后破碎是造成堵塞的主要原因,也是造成spike型失速初始扰动的原因.
A time-accurate method was used to study the unsteady tip flow field of a high-load transonic axial compressor rotor at 98% design speed. The results show that the oscillation of the shock wave is not obvious and the flow in the tip region is not The regularity mainly stems from the tip leakage vortex crushing and its mutual interference with the shock wave.Compared with the design state and the state of the tip leakage vortex at the stalling state, at the time of the near stalling point, the tip region intermittently appears Edge overflow.The analysis shows that tip leakage vortex crushing after shock wave is the main cause of blockage and also causes the initial disturbance of spike-type stall.