环境压力对冲蚀、空蚀交互磨损影响研究  

Effect of Environmental Pressure on Interactive Erosion and Cavitation Wear

作　　者：朱宗铭[1] 庞佑霞[1] 梁亮[1] 唐勇[1] 

机构地区：[1]长沙学院先进设计与制造技术研究所,长沙410022

出　　处：《机械科学与技术》2013年第10期1509-1513,共5页Mechanical Science and Technology for Aerospace Engineering

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

摘　　要：在转盘式磨损试验装置上进行了环境压力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,数值研究了试件表面汽液固三相流场及特性,以及环境压力对交互磨损的影响。结果表明:在4种环境压力参数下,交互磨损失重量随着环境压力的增大呈线性递减,即环境压力越大交互磨损程度越轻微;数值计算的转盘表面总压等值线、汽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 set-up, we perform the interactive erosion and cavitation wearing experiments of three phases under different environmental pressures. We use the computational fluid dynamics （CFD） method to simulate the working conditions of a hydraulic turbine under different environmental pressures in the three phases of vapor, liquid and solid. The flow fields and their characteristics on the turntable surface are nu- merically analyzed. The analysis results show that under four different environmental pressures, when pressure in- creases, interactive wear weight loss decreases linearly, namely the interactive wear is more slight; the overlay area between total pressure contours and vapor phase volume fraction contours is in accord with the interactive wear sur- face morphology of the test specimen of test pieces, namely the numerical results coincide better, thus proving that the theoretical analysis is reasonable.

关 键 词：冲蚀 空蚀 交互磨损 环境压力 

分 类 号：TH117.3[机械工程—机械设计及理论]