An numerical investigation into the effects of boundary layer suction on the off-design performance of a compressor cascade with large camber angles is carried out.

The numerical simulation of the effects of different suction slot geometries on the performance of compressor cascade when boundary layer suction is applied shows that boundary layer suction reduces the cascade losses significantly, improves the flow conditions and enhances the diffusion.

The result showed that boundary layer suction (BLS) alleviates the accumulation of low energy fluid at suction surface corners and enhances the ability of flow turning.

By means of it,we reduce the reaction of the rotor and suppress its separate flow and control the 3D separate flow in stator using wall suction.

Values of the molecular interaction parameters of the two surfactant molecules,β s at the adsorbed layer,β m in the mixed micelle,and consistence of the adsorbed layer and the micelle,were obtained.

The characteristic features of the concept are made clear through its comparison with the MIT boundary layer suction com- pressor.

A numerical investigation about effects of boundary layer suction in low-speed compressor stator cascade with large turning angle was carried out.

To provide a further prospective of the boundary layer separation of compressor rotor under high load and off-design working conditions,numerical method was used to study the effects of boundary layer suction of compressor rotor at different suction positions and suction flow rates on the aerodynamic performance of rotor.