Abstract
Recent researches have indicated that flow fields near rotating stall inception in a low-speed axial compressor rotor with two different tip clearances are different from each other. In the large tip clearance case, rotating disturbance appears and disappears repeatedly at interval of several tens or hundreds of rotation. It is thought that the stall inception process in the large tip clearance case is dominated by the breakdown of the rotor tip leakage vortex, but it needs more investigation and analysis to explain. In this study, the evolution process of rotating disturbance in a low-speed axial compressor has been investigated by using techniques of experimental measurement and statistical method.
