弓形静子提高压气机抗旋流畸变能力研究

为降低旋流畸变对轴流压气机性能和稳定性的影响，对双级低速轴流压气机的第1级静子进行了3种不同正弯角的弓形叶片设计.采用整环三维定常计算方法，研究了对涡旋流下压气机的性能和稳定性.结果表明:静子采用合理的正弯曲设计能够提高压气机抗对涡旋流的能力.正弯曲弓形静子能够降低端壁区域的负荷，抑制各排叶片叶根区域吸力面附面层分离的形成以减小损失、提高效率和总压比.静叶弯角为10°时峰值效率增加1.5%，失速边界点流量减小6.95%.流量为18.5kg/s时，效率、总压比分别增加1.7%和0.03%.当弯角过大时，叶中区域负荷上升且摩擦损失增大，反而不利于效率和总压比的提升. 

Study on improvement of the compressor anti-swirl distortion capacity with bowed stator

In order to reduce the effect of swirl distortion on performance and stability of axial compressor, the first-stage stator of two-stage low speed axial compressor was designed into bowed blade with three different positive bending angles. A full annulus three-dimensional steady simulation method was used to investigate the effect of twin swirl on performance and stability of compressor. The results show that stator with appropriate positive bending design can improve the anti-twin swirl capacity of compressor. By reducing the load of blade at end wall regions using bowed stator blades, the suction surface boundary layer separation at hub will be decreased, loss will be reduced, and both of efficiency and total pressure ratio will be increased as a result. The maximum efficiency can be increased by 1.5% and mass flow rate at stall boundary point can be decreased by 6.95% when bending angles of stator blades equal to 10 degree. The efficiency and total pressure ratio will be increased by 1.7% and 0.03% respectively when mass flow rate equals to 18.5kg/s. Load at mid-span region and friction loss will increase when bending angle is too large, making it harmful to improve the efficiency and total pressure ratio.