Aerodynamic design and analysis of a highly-loaded aspirated compressor

In order to further increase the pressure ratio of axial compressor stage, with the method of boundary layer suction, a set of system including S2 through-flow calculation, inviscid inverse design of aspirated airfoil, scheme optimization of boundary layer suction, validation of three-dimension time-averaged flow field calculation was preliminarily established. Research results show that depending on this system, an aspirated compressor which achieves a total pressure ratio of 3.51, an isentropic efficiency of 86.82% and a load factor of more than 0.6 was designed using only 1.7% relative suction mass flow, and validated successfully by three-dimension time-averaged flow field based on the nonlinear harmonic (NLH). As suction basically eliminates wake deficit of upstream rotor, interstage interference is small, and the difference of peak efficiency and total pressure ratio between time-averaged and steady characteristic line is 0.12% and 0.003, respectively.