Analysis of the Aerodynamic Performance of a Super-highly Loaded Adsorption Type Compressor Cascade

Numerically studied was the influence of boundary layer elimination by a suction at a low speed on the aerodynamic performance of a super-highly loaded compressor cascade.The distribution of the total pressure loss,diffusion factor and air-flow angle along the blade height was analyzed,and the limit streamline and profile static pressure on the suction surface were given.It has been found that the boundary layer elimination by suction can effectively improve the cascade aerodynamic performance,and the low-energy fluid removal through a suction can decrease the separation of the suction surface and the corner area,increasing the capacity of the flow path and enhancing the cascade load and diffusion capacity.In addition,the larger the suction air flow rate,the more conspicuous the improvement.A suction at a location of 60% axial chord can achieve the best effectiveness.The influence of the suction location on suction effectiveness is larger than that of the suction air flow rate.To appropriately increase the suction air flow rate can enhance the suction effectiveness,and the selection of an optimum suction location and air flow rate is correlated with the diffusion process and separation degree inside the cascade.