水轮机转轮叶片的汽蚀破坏及其防护问题已有过不少研究,但对导水叶汽蚀问题的研究却较少。实际上导水叶和转轮叶片同样处在高速水流之中,同样会在导水叶的边壁产生水流的空化和空蚀作用。在导水叶关闭时,因导水叶密封的局部间隙漏水也将引起间隙汽蚀。 There have been many researches on cavitation destruction and protection of turbine runner blades, but there are few researches on the cavitation of water turbine blades. In fact, the guide vane and the runner vane are also in the high-speed water flow, and the cavitation and cavitation of the water flow also occur on the side wall of the guide vane. When the water guide leaf is closed, leakage due to the local clearance of the water guide vane will also cause gap cavitation.