The stall inception of a single low speed compressor was investigated with uniform inlet flow.By installing high response dynamic pressure transducers in the circumferential and axial directions

the dynamic pressure data at different positions were collected and analyzed using time analysis and frequency analysis

respectively.The results indicate that the spike-type inception will appear before stall;the stall cells are splited and incorporated

but two cells are always incorporated to one when exiting from stalling quickly;and frequency analysis of the dynamic pressure validate the veracity of the number of stall cell.