The Impact Of Blade Bowing And Sweeping On The Multi-stage Compressor Blade Performance

Axial compressor design technology is one of the core technology of the gas turbine. On the base of 3-D analysis, blade bowing and sweeping technique is to design blade considering the combined effects of bowing, sweeping and twisting. The sweeping technique, especially forward sweeping one has been employed to weaken tip shock of rotor. And the bowing technique has been applied to improve endwall flow condition, reduce endwall flow loss, and make the blade geometry more adaptive to the flow, consequently to increase work ability and performance of the blade. As important means to control endwall secondary flow and shockwave, blade bowing and sweeping technology have been widely applied in compressors and fans to achieve higher efficiency and larger stall margin.In this paper, participate in the design of a low pressure compressor work, by the technical requirement of known parameters, complete the low-pressure compressor one-dimensional flow design, S2 inverse design and 3 d aerodynamic design, obtained the airfoil data of multistage compressor blade,this compressor as the prototype. 3D numerical simulation was carried out by commercial software CFX to analysis the effects on the aerodynamic performance of the compressor stage rotor blade which optimized with compound forward sweep near the case regions. First on the top of the parametric transonic rotor is introduced into the appropriate forward-swept,to reduce the blade tip shock wave intensity, reduce the blade tip transverse differential pressure, reduce the tip leakage vortex loss and secondary flow loss, the purpose of making cross step dynamic efficiency and flow rate are improved. The paper carried on the blade bending after retrofit, aimed at improving the blade aerodynamic performance, the rotor blade pressure and flow rate are improved.Upon completion of the bow and sweep design research, the sweeping-curved rotor is applied to the low pressure compressor, studied and analyzed the performance impact by sweeping or bending the first statge rotor, swept blade application in tertiary compressor make the traffic efficiency are improved, and curved blade to improve flow and the efficiency, there is no impact on the pressure ratio...