高技术通讯2023，Vol.33Issue(11)：1202-1212,11.DOI:10.3772/j.issn.1002-0470.2023.11.008
颗粒形状对弯管冲蚀磨损影响的数值模拟研究
Numerical simulation research for the effect of particle shape on the erosion wear in elbow
摘要
Abstract
In order to study the effect of solid particles of different shapes in the gas pipelines on the erosion wear charac-teristics of the elbow and predict the wear distribution of the inner wall of the elbow after being impacted,computa-tional fluid dynamics(CFD)is used to calculate the gas flow.The discrete element method(DEM)is used to cal-culate the particle motion,and the non-spherical particles are described by the super-ellipsoids model.The shear impact energy model(SIEM)is used to calculate elbow wear.The simulation results show that,under the same gas velocity,although the difference of the movement of particles of different shapes in the elbow is not evident,the corresponding wear condition of the inner wall of the elbow is significantly different from each other:the closer the particle shape is to the square,the higher the maximum wear rate in the elbow,and the wider the range of serious wear.But the position of the maximum wear rate will tend to be stable.The probability of sliding friction of prolate ellipsoid particles in the elbow is higher,while the probability of rolling friction of oblate ellipsoid particles is high-er,which causes the total wear rate of prolate ellipsoid particles on the elbow to be higher than that of the oblate el-lipsoid.Comparing the influence of particle shape on the wear of the elbow under different gas velocities,it can be found that larger gas velocity only homogeneously increases the wear of the elbow and the maximum erosion zone will not change.关键词
离散单元法(DEM)/弯管/冲蚀/磨损/颗粒形状/气固两相流/单向耦合/气速Key words
discrete element method/elbow/erosion/wear/particle shape/gas-solid two phase flow/unidi-rectional coupling/gas velocity引用本文复制引用
李震东,许磊,包士毅..颗粒形状对弯管冲蚀磨损影响的数值模拟研究[J].高技术通讯,2023,33(11):1202-1212,11.基金项目
国家自然科学基金(52075489),浙江省公益技术研究计划(LGG20E050017)和浙江省市场监督管理局科研计划(20200121)资助项目. （52075489）
