Research on design of swept and bowed rotor in a transonic axial flow compressor

Firstly, the design parameters of forward sweep and positive bow were carried out separately for a transonic axial flow compressor rotor. The rotor's 3-D design was done by combining forward sweep and positive bow together based on the above research results of bowed and swept rotor's aerodynamic performance. At the same time, the 2D design at the mid-span of the rotor profiles was done to offset the rotor's performance degradation caused by the application of sweep and bow. The performance of the transonic stage by final design enhanced remarkably. The highest stage efficiency increases by 3%, as well as the stall margin by 40%. Meanwhile the total pressure ratio increases a little higher. Numerical calculation results show that both the forward swept and positive bowed rotors can make the shock at the tip move to downstream and shock strength reduce. The interaction of shock with boundary layer and leakage vortex in the tip region are alleviated. The ability of controlling the shock intensity and improving end-wall flow condition by the swept and bowed rotor shows more remarkable.