转轮叶片尾缘的斜切对涡流尾迹的频率和强度影响很大,设定值高的水轮机的尾缘斜切和叶片与下环之间接缝的修圆可减少对转轮尾缘和下环的空化破坏。论述了水轮机尾缘几何形状的水力特性、涡旋脱落频率和叶片自然频率之间的谐振机理,以及改进空化性能和效率的可行性。 The chamfer at the trailing edge of the runner blade has a great influence on the frequency and strength of the wake of the vortex flow. The beveling of the trailing edge of the turbine with high set point and the rounding of the seam between the vane and the lower ring can reduce the influence on the wake trailing edge and the under Cavity destruction of the ring. The hydraulic characteristics of turbine tail geometry, the resonance mechanism between vortex shedding frequency and blade natural frequency, and the feasibility of improving cavitation performance and efficiency are discussed.