在轴流压气机中，相较于突尖波，模态波失速先兆更易于被监测并实施主动控制。近年来对于被动控制的研究表明，一些端壁处理设计能够将失速先兆由突尖波型转变为模态波型，而背后的作用机理及设计方法尚不明确。基于这一出发点，本项目拟采用低速大尺寸压气机试验台（LSRC）作为主要研究对象，综合运用五孔探针、热线、高频响动态压力传感器等测试系统，结合高精度的DES数值分析，探索两种失速先兆之间转换的流动机理及动力学机制，构建模态波失速先兆特征与端壁处理设计参数之间的关联模型，揭示与模态波存在性及能量特征相关的端壁处理关键设计参数，阐明真实复杂来流条件下端壁处理调控失速先兆的内在规律，建立基于调控失速先兆模式的端壁处理设计策略。

In axial compressor, there are two types of stall inception, which are spike-type inception and modal-type inception. Compared with spike inception, it’s easier to monitor and perform active flow control to modal inception. Recent researches show that some designs of endwall treatment can convert spike-type into modal-type stall inception. However, the mechanism of conversion is still unknown, as well as the design method of this kind of casing treatment. Hence, a new four-stage large scale research compressor will be experimentally investigated by 5-hole probes, hot-wire and high frequency pressure transducers. Numerical simulations will also be carried out on the LSRC by DES. The purposes of this project include: exploring the flow mechanism and dynamics mechanism of the conversion of two stall inceptions; building a correlation model between characteristics of modal-type inception and design parameters of endwall treatment; revealing the key design parameter of endwall treatment about the existence and energy of modal-type inception; illuminating the inherent law of manipulating stall inception under real and complex inflow environment; establishing the design strategy of endwall treatment in axial compressors based on manipulating the stall inception type.