Three-dimensional axial compressor model is established by using the method of mesh in Gambit and the different boundary of compressed N-S equation is evaluated.Based on the turbulent model of standard model k-ε of double equation

diversified through the finite volume method and calculated by that the characteristic curve of compressor is plotted with the data of Fluent algorithm and classic formula algorithm.Then through the simulation validates the reliability of the three-dimensional numerical simulation

analysis the instability process of compressor under different rotating speed in the rotating stall and surge characteristics and recovery calculation process after instability.Finally

imported the active actuator close coupled valve(CCV)

compressor characteristic curve of non-dimensional flow and pressure is changed because of the different CCV opening.It reduces the least flow of compressor in other words

the result of importing CCV is that the characteristic curve of compressor moves to the left

and expands the steady operating areas of compressor greatly.It is important for avoiding instability.