基于CFD数值模拟的异面三通管冲蚀磨损规律研究  

Study on Erosion Wear Law of Tee in Different Planes Based on CFD Numerical Simulation

作　　者：莫丽[1] 刘栖 许先雨 MO Li;LIU Xi;XU Xianyu(School of Mechanical and Electrical Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500

出　　处：《润滑与密封》2022年第8期41-46,共6页Lubrication Engineering

基　　金：国家重点研发计划项目(2019YFC031230)。

摘　　要：针对管道在输送过程中,由流体中固态颗粒产生的冲蚀磨损导致的失效问题,通过CFD-DPM模型开展关于不同流速、颗粒直径、含砂体积比和异面管夹角对异面三通冲蚀磨损性能影响的分析。结果表明:三管交汇处的弯面是管道主要发生冲蚀磨损的位置,水平两管弯头上侧管壁处是受损最为严重的部位;在流速2~10 m/s、含砂体积比1%~9%、异面管夹角90°~150°、颗粒直径0.1~0.5 mm时,管道的最大冲蚀率随着流速增大呈指数型增长,冲蚀面积明显扩张;低流速下,含砂体积比对最大冲蚀率影响较弱,高流速下,最大冲蚀率与含砂体积比呈线性正相关;异面管夹角的增大降低了管道对固体颗粒的流动约束性,其冲蚀率呈线性减小;最大冲蚀率随颗粒直径的增大整体呈现平缓上升的趋势,大颗粒产生的冲蚀破坏相比小颗粒更为集中一些。Aimed at the failure problem caused by the erosion wear of solid particles in the fluid during the pipeline transportation,CFD-DPM model was used to analyze the influence of different flow rates,particle diameters,sand volume ratio and included angle of different-surface pipes on erosion wear performance of tee in different planes.The results show that the bend at the junction of the three pipes is the location where the pipes mainly undergo erosion wear,and the upper pipe wall of the horizontal two-pipe elbow is the most severely damaged location.When the flow rate is 2 m/s to 10 m/s,the volume ratio of sand is 1% to 9%,the angle of tee in different planes is 90°to 150°,and the particle diameter is 0.1 mm to 0.5 mm,the maximum erosion rate of the pipeline increases exponentially as the flow rate increases,and the erosion area is significantly expanded.At low flow rates,the sand volume ratio has a little impact on the maximum erosion rate,while at high flow rates,the maximum erosion rate has a linear positive correlation with the sand volume ratio.The increase of the angle of tee in different planes reduces the flow restriction of the pipes to solid particles,and the erosion rate decreases linearly.The maximum erosion rate shows a gentle upward trend with the increase of particle diameter,and the erosion damage caused by large particles is more concentrated compared with small particles.

关 键 词：异面三通管 冲蚀磨损 冲蚀速率 冲蚀模型 

分 类 号：TH117.1[机械工程—机械设计及理论] TG172.9[金属学及工艺—金属表面处理]