The emission frequency of the Karman vortex street occurred in series from the blades and tongue is varing with the running condition.

• 将流程泵叶轮叶片和压水室的隔舌看作旋涡发生体,在不同运行工况下在叶片后缘以及隔舌两侧串联发生的卡门涡街的发射频率是不同的。