Coupling optimization design for aspirated compressor airfoil and aspirated scheme

In order to explore the design characteristics of the aspirated airfoil, a new optimization design method coupling airfoil and aspirated scheme was presented. This method was developed for coupling optimization, which combined Artificial Bee Colony Algorithm(ABC)and quasi-three dimensional cascade calculation programme. The design condition is that inlet Mach number is 0.7 and incidence is 1.9°. In the design condition, comparison and analysis were made between coupling optimized design scheme and original design scheme. And cascade wind tunnel experiment was conducted to demonstrate the optimization effect. Research results show that the coupling optimized design can make the total pressure loss reduce by 27%, and the load increase by 2%. Appropriate changing blade leading edge radius can delay the boundary layer transition position, reduce the flow friction loss, and make the boundary layer flow more reasonable. In this paper design condition, more uniform load distribution can improve the aspirated airfoil design performance. Aspirated scheme that has suction location in 54% relative chord combined with suction air flow rate of 0.75%, can effectively control boundary layer separation, and reduce the energy output on suction.