三峡水电站过机泥沙粒径对水轮机叶片空化空蚀的影响  

Research on the Size of Sediment Passing through the Turbine Effects on Cavitation and Cavitation Erosion for the Blade of Three Gorges Hydropower Plant

作　　者：廖庭庭[1] 陈和春[1] 高甜[1] 王伟[1] 陈彪[1] 严涛[1] 王飞[2] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《中国农村水利水电》2012年第2期121-123,126,共4页China Rural Water and Hydropower

基　　金：长江电力股份有限公司技术咨询项目(SDHZ-211121007);三峡大学科研创新基金(2010CX012);三峡大学硕士学位论文培优基金(2011PY007)

摘　　要：由于紊流中布满的涡体,利用涡成因说分析涡体对脉动、空化的影响和脉动与空蚀的关系。从涡与泥沙粒径的影响关系和空化及空蚀的2种机械破坏模式、空蚀和磨损的形态特征等方面入手,分析空蚀破坏机理,探讨了泥沙粒径对空化空蚀的影响。结合三峡水电站水轮机的磨蚀情况,得出不同颗粒粒径的磨蚀破坏机理之间的差异。此外,对于三峡水电站,空泡在水轮机含沙水流中溃灭时,空蚀与磨损具有存在性与普遍性,且耦合共同作用导致叶片破坏。As the eddy is full of the turbulence body,the cause theory of the eddy is used to analyze the eddy take effect on the pulsation and the cavitation,and the relationship between the pulsation and cavitation erosion.From the relationship between the eddy,the sediment particle size and the two cavitation erosion mechanical failure model and the destroy conformation of cavitation erosion and abrasion,the cavitation erosion failure is analyzed and the relationshiop between the sediment particle size and the cavitation and cavitation erosion is discussed.Based on the turbine erosion of the Three Gorges Hydropower Plant（TGHP）,a conclusion is reached that the different sediment particle size has different mechanisms of the erosion damage.What is more,when the bubble collapses in the sediment flow for CTGP,cavitation erosion and abrasion is and universal,and they couple together to result in leaf damage.

关 键 词：三峡水电站 泥沙径粒 空化 空蚀 

分 类 号：TG174[金属学及工艺—金属表面处理]