中文摘要：

开展了一种新型机匣处理扩大轴流风扇/压气机稳定裕度的试验研究。在低速风扇试验台上模拟旋转进气畸变,分析此种畸变进气条件对压气机工作性能造成的影响,并且考察一种新型机匣处理的扩稳效果。旋转进气畸变下,压升-流量特性曲线失速边界向右下偏移,压气机失速裕度明显降低。新型机匣处理在旋转进气畸变条件下对风扇/压气机有显著的扩稳效果,较小畸变转速（200,500r/min）情况下,新型机匣处理能提高压气机稳定裕度10%~20%,同时并没有带来明显的效率损失;畸变转速为800r/min情况下,机匣处理的扩稳效果相比并不明显,但可以提高压气机工作效率1%~2%。较大畸变转速情况下,畸变方向不同,机匣处理扩稳效果有所差别：正向畸变时机匣处理提高压气机失速裕度3%~10%,提高效率1%左右;而反向畸变时,失速裕度均提高10%以上,甚至达到20%,但压气机效率损失在1%左右。

英文摘要：

This paper carries out an experimental investigation of a new type of casing treatment to improve axial flow fan/compressor stall margin.The main work is,simulating the rotating inlet distortion on a low-speed fan,describing the pressure rise curve and efficiency curve under different conditions with the experimental data so as to analyze the compressor’s performance under distortion inlet conditions on the fan and study the novel casing treatment’s ability of stability enhancement.The experimental results show that when the pressure rise curve moves to the lower-right direction under inlet distortion,the stall margin is significantly decreased under the condition of different distortion degrees;the new type casing treatment has a significant effect on expanding the stability of compressor under the rotating inlet distortion;when the distortion speed is low（200,500r/min）,the expansion of stabilizing effect is obvious,the stall margin enhancement is about 10%to20%,and the efficiency loss caused by the casing treatment is small;when the distortion speed is 800r/min,the enhancement of stability is not obvious,but the efficiency can be increased by 1%-2%;under the higher distortion speed condition,the different rotating directions of the distortion plates result in different effects on stability enhancement;the co-rotation distortion can enhance the stall margin by about 3%-10% with a efficiency increase about 1%;the counter rotation distortion can enhance the stall margin by more than 10%,even to 20% with a efficiency loss about 1%.