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.