打磨修理对跨声速压气机性能的影响研究

为了控制航空发动机压气机叶片损伤继续发展,通常采用孔探打磨进行修理.为研究其带来的影响,选取跨声速压气机Rotor37为研究对象,构建了不同叶高的叶片前缘打磨修理模型,采用数值模拟方法,研究了打磨修理对跨声速压气机气动性能的影响,结果表明:叶片前缘打磨修理使压气机整体性能下降,压比减小,效率降低,使堵塞点流量减小,而对...

Research on Influence of Blending Repair on Transonic Compressor Performance

In order to control the damage of aero-engine compressor blade,it is usually repaired by borescope blending.The compressor models with different blending location of blade height are built for numerical simulation for researching on influence of blending repair on transonic compressor performance which are based on Rotor 37.The results show that the blade leading edge blending leads to the decrease of overall performance,pressure ratio and efficiency,reduce choke point flow,and no effect on the stall point flow.The influence of blending repair center with different blade height on the compressor aerodynamic performance is the same,with the same amplitude.But the different blade height causes the change of compressor internal flow field.The Mach number before the shock wave increases at the blending location,and the shock wave intensity increases.The effect increases with the increase of blade height.The relative kinetic energy at the compressor inlet decreases near the blade blending location due to blending.