一、前言 为了寻求一种既能消除水轮机尾水管内低频水压脉动,又有利于水轮机组的安全经济运行且结构本身坚固耐久的措施,两年来,在水轮机模型机组及原型水轮机组的尾水管内进行了一系列导流栅消振效果的试验。试验结果证明,导流栅不但对消除尾水管内低频水压脉动有良好的效果,而且其结构合理,水力性能优越。 I. INTRODUCTION In order to find a way to eliminate the low-frequency hydraulic pulsation in the draft tube of a hydraulic turbine and to ensure the safe and economic operation of the turbine and the inherent durability of the structure, two years have passed since the draft of the turbine model unit and prototype turbine unit A series of experiments were conducted in the pipe to suppress the vibration of the diversion grid. The test results show that the diversion gate not only has a good effect on eliminating the low-frequency hydraulic pulsation in the draft tube, but also has a reasonable structure and excellent hydraulic performance.