基于E/CRC磨损模型的离心泵壁面磨损特性研究  

Erosion characteristics of centrifugal pumps based on E/CRC erosion model

作　　者：赖芬[1] 王凤鸣 朱相源 常沛然 李国君[1] LAI Fen;WANG Fengming;ZHU Xiangyuan;CHANG Peiran;LI Guojun(MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi′an Jiaotong University, Xi′an 710049, China)

机构地区：[1]西安交通大学热流科学与工程教育部重点实验室,陕西西安710049

出　　处：《哈尔滨工程大学学报》2021年第5期719-728,共10页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2016YFB0200901).

摘　　要：为了探索离心泵内液固两相流动及固体颗粒引起的壁面磨损特性,本文基于E/CRC磨损模型进行了数值预测,获得了设计工况下离心泵各个区域的磨损形态并对比不同区域的最大和平均磨损率,分析了磨损率变化规律并预测了最大磨损率发生位置,讨论了颗粒粒径及浓度对离心泵叶轮磨损特性的影响。结果表明:磨损最严重的区域在叶片前缘及叶片压力侧尾缘附近;后盖板的平均磨损率最大,叶片及后盖板的最大磨损率最大,最大磨损率在叶片与后盖板交界处叶片曲率角59.8°附近;颗粒粒径及浓度均对叶轮磨损特性有显著的影响,随颗粒粒径的增大,前盖板及叶片的磨损区域面积显著减小,而后盖板的磨损区域面积几乎不变,磨损率呈减小趋势;随颗粒浓度的增大,叶轮磨损区域面积几乎不变,磨损率呈增大趋势。This study conducted numerical predictions on the basis of the E/CRC erosion model to investigate the liquid-solid flow and solid particle erosion characteristics of centrifugal pumps.The erosion patterns in all regions of a centrifugal pump were obtained under design conditions.The maximum and average erosion rates for different regions were compared.The erosion rate variations were analyzed,and the location of the maximum erosion rate was predicted.The effects of particle diameter and concentration on the erosion characteristics of the centrifugal pump impeller were also discussed.Results showed that the most severe erosion areas were in the vicinity of the leading edge of the blade and the trailing edge of the blade pressure side.The average erosion rate of the hub was the largest.The maximum erosion rate of the blade and hub was the largest,and it was observed at the junction of the blade and back shroud with a blade curvature angle of 59.8°.Particle diameter and concentration exerted significant influences on the erosion characteristics of the centrifugal pump impeller.With an increase in particle diameter,the erosion areas of the shroud and blade showed a significant decrease.By contrast,the erosion area of the hub remained almost the same,and the erosion rate presented a decreasing trend.With an increase in particle concentration,the erosion area of the impeller remained almost the same,and the erosion rate presented an increasing trend.

关 键 词：离心泵 液固两相流 固体颗粒 磨损特性 磨损模型 磨损形态 最大磨损率 颗粒粒径 颗粒浓度 

分 类 号：TH311[机械工程—机械制造及自动化]