亚声速轴流压气机失速监测方法试验

为了研究轴流压气机失速先兆信号监测的有效算法,对亚声速轴流压气机试验台的孤立转子在不同转速下,从稳定工况到失速工况叶顶不同轴向位置进行了动态压力信号测量试验,采用自相关分析和方差分析算法对试验数据进行了对比分析。结果表明,该压气机为突尖型失速,在叶顶前缘附近能明显感受到失速先兆信号,自相关分析监测到失速先兆信号的时间明显早于方差分析,可更有效的达到失速预警的作用。

Experiment of the Algorithm of Detecting the Stall Inception for the Subsonic Compressor

To study an effective algorithm of detecting the stall inception signal for the axial compressor,the subsonic axial-flow isolated rotor was gradually pushed to stall at the different rotor speed to measure dynamic pressure signal at the different axial position of blade tips.Then the test data with the autocorrelation analysis and the variance analysis was studied.Test data presented show that the compressor stall is caused by the spike and the stall inception signal can be detected obviously near the rotor leading edge.Finally,the reaction time of autocorrelation analysis is longer than that of the variance analysis for the compressor.Thus,autocorrelation analysis is more effective to detect the stall inception.