中文摘要：

本文采用数值模拟和实验测量相结合的方法，以叶顶间隙流的非定常流场特征为切入点，系统地研究了畸变情况下轴流压气机旋转失速的触发机理。研究结果表明：畸变影响区内叶片负载明显高于非畸变影响区；畸变影响区内逆压梯度的增大使得叶顶泄漏涡轨迹前移，当节流到一定程度时，叶顶泄漏流溢出，形成类尖脉冲扰动，类尖脉冲扰动的间歇性发展，最终诱发旋转失速。

英文摘要：

A numerical and experimental study of stall trigger mechanism of a low speed axial compressor with inlet distortion is presented in this paper. The results show that the heavier blade loading in distorted sectors cause the TLV in the distorted sectors move closer to the leading edge of the rotor blade and when the mass flow rate is low enough, a spike-like disturbance will initiate from the distorted sectors and propagate with a relative fixed speed. The unsteady CFD simulation further confirms that such a disturbance corresponds to a vortex spinning out of the leading edge of the blades. However, the initiation of this spike-like disturbance doesn＇t trigger the full stall immediately. The tracking of the disturbances indicates that most of such spike-like disturbances will be smeared by non-distorted sector and the growth of the spike-like disturbances actually relate closely to how and how often the path of the propagating disturbances come across the path of the rotating distorted sector.