Taking a highly-loaded eight-stage axial compressor as an object of research

the effect of inter-stage bleeding on compressor performance

inner flow-field and inter-stage matching in highly-loaded multistage axial compressor was investigated numerically. The result shows that inter-stage bleeding can significantly improve the compressor's performance. The bleeding results in 1% increase of the inlet mass flow and of 1.5% increase of the highest efficiency. In addition

the bleeding can decrease the pressure and density of air near the bleeding pores. This leads to an increase of mass flow upstream with the largest load position of rotors moving to downstream as well as a decrease of the mass flow downstream with the largest load position of rotors kept steady proximately. Moreover

bleeding contributes to change the working point position of stages in upstream and downstream of the bleeding position and alter the inter-stage matching of compressor. At the same time

bleeding at the trailing edge of stator could diminish thickness of boundary layer and change inlet condition of rotor downstream.