多级轴流压气机机匣处理级的探讨

本文提出了一种确定多级轴流压气机机匣处理级的新方法。首先,预测多级轴流压气机各级的级极限负荷,依此确定旋转失速发生时率先失速的级并得到实验证实;其次,将率先失速级作为待处理的级,并在一亚音速双级轴流压气机实验台上针对四种不同型式的机匣处理,进行了较为系统的实验验证。实验结果证实在率先失速级上进行机匣处理会取得很好的扩稳效果,用级极限负荷来确定多级轴流压气机机匣处理级的方法具有广阔的应用前景。

Research on the Axial Position of Treated Casing in Multistage Axial-Flow Compressors

A new method for determining the axial position of treated casing in multistage axial flow compressors is set up in this paper.Firstly,the stalling pressure rise capability of axial flow compressor stages is predicted,and the stage in which stall occurs first could be located theoretically and be verified experimentally.Secondly,the stage stall appearing first is taken as the axial position of treated casing.The idea is verified in a systematic way with the help of four kinds of different casing treatment in a subsonic two stage axial flow compressor.Experimental results indicate that the treated casing placed on the first stalling stage could improve the stall margin better.The method presented in the paper could be used as the guide in the casing treatment design for determining the axial position of the treated casing.