Influences of tip injection and bleeding on the performances of a transonic axial-flow compressor

The flow characteristics of NASA Rotor37 transonic axial-flow compressor from choke to near surge working condition are numerically simulated and validated in this paper. With the flow analysis of near surge condition, tip injection and bleeding are utilized to interact on tip leakage vortex and passage shock and the corresponding influences are investigated. Results reveal that with tip injection and bleeding, passage choke caused by fluid of low energy and tip clearance flow can be improved, thus compressor surge point can be effectively delayed. Results also show that with the injection and bleeding method used in this paper, the working range of NASA Rotor37 compressor is increased by 24%.