含沙水流绝对速度对冲蚀、空蚀交互磨损的影响  

Effect of Absolute Velocity of Sandy Water on Interactive Erosion and Cavitation Wears

作　　者：朱宗铭[1] 庞佑霞[1] 梁亮[1] 唐勇[1] 

机构地区：[1]长沙大学先进设计与制造技术研究所,湖南长沙410022

出　　处：《机械设计与研究》2013年第5期107-111,共5页Machine Design And Research

基　　金：国家自然科学基金资助项目(50975032);湖南省教育厅(11C0116);湖南省"十二五"重点建设学科资助项目

摘　　要：在转盘式磨损试验装置上进行了含沙水流绝对速度对冲蚀和空蚀交互磨损影响的试验,基于计算流体力学(Computational Fluid Dynamics,CFD)方法,模拟水轮机工况,数值研究了不同含沙水流绝对速度下,试件表面气液固三相流场及特性。结果表明:在4种入射绝对速度参数下,交互磨损失重量随着绝对速度的增大而递增,即绝对速度越大交互磨损程度越严重;数值计算的转盘表面总压等值线、气相体积比等值线两者的叠加区域与试验结果中试件的交互磨损表面形貌基本一致,即数值计算结果和试验结果吻合得较好。On the rotating wearing experimental device,the interactive erosion and cavitation wearing experiments of three phases under different sandy water absolute velocity are done.Based on the computational fluid dynamics （CFD） method,simulating the working conditions of hydraulic turbine in different sandy water absolute velocity,the three-phase （namely vapor,liquid and solid） flow fields and their characteristics on the turntable surface are numerically analyzed.The results show that under four different sandy water absolute velocity,when they are increased,interactive wear weight loss is increased linearly,and interactive wears are more heavy; the overlay area of both the total pressure contours and the vapor phase volume fraction contours is basically in accord with the interactive wear surface morphology of the test pieces,namely the numerical results and the experimental results coincide better,which proves the theoretical analysis is reasonable.

关 键 词：冲蚀 空蚀 交互磨损 绝对速度 

分 类 号：TH117.3[机械工程—机械设计及理论]