Based on the numerical simulation method

frequency spectrum analysis and structure analysis were conducted for the three dimensional unsteady flow inside the compressor rotor.Through the analyses of the time-average flow field and the animated isentropic cartoon

we recognize the characteristics of the flow field

the existence range of the vortex shedding.The interaction of the leading edge and trail edge vortex and corner vortex was investigated

and the rule of their development and their effect to each other were also discussed along with the frequency spectrum analysis.For separated flow

dynamic demonstration graph and spectrum analysis were used to estimate the vortex shedding and corner vortex frequencies.The work can be used as theoretical foundations for active and passive control of compressor to improve its performance.