Analysis of the interaction superposition effect between potential flow and wake in axial compressor blade rows

The interaction between wake and potential flow may have much influence on the pressure fluctuation strength of blade surface and the outlet axial velocity distribution and fluctuation for compressor. In this paper, the two stages transonic axial compressor was focused and the numerical method was used to investigate the position change of blade surface pressure fluctuation offset area under the different rotor blade circumference positions. It can be shown that the change of rotor circumference positions may exert the influence on the stator blade wakes' pattern and cause the change of blade surface pressure fluctuation offset area. The phenomenon that upstream rotor blade wakes decrease the decay of downstream stator blade wakes existed with the change of rotor circumference positions, which also changed the interaction strength between the blade rows and the blade surface pressure fluctuation strength.