在水力发电工程中,高水头泄水建筑物的过流表面经常遭受空蚀破坏,影响工程安全。对高速水流引起的空蚀破坏问题,国内外进行了许多研究工作。通常用来防止空蚀破坏的措施有三种:一是选择合理的体型,使过流表面的体型流线化,避免水流发生分离现象;二是提高过流表面衬砌材料的抗空蚀强度;三是严格控制过流表面的不平整度。这些措施对减免 In hydropower projects, the over-flow surface of high head-drain buildings often suffer from cavitation damage, affecting the safety of the project. For the problem of cavitation damage caused by high-speed water flow, many researches have been done at home and abroad. Commonly used to prevent cavitation damage measures in three ways: First, choose a reasonable size, the body flow over the surface flow to avoid separation of water flow phenomenon; the second is to improve the overcurrent surface lining material cavitation erosion strength; three Is strictly controlled over the surface of the unevenness. These measures are for relief