基于冲蚀流动与动网格耦合的弯管磨损量化研究  

Quantitative Analysis of Bend Pipe Wear Based on Erosion Dynamic Mesh Coupling Method

作　　者：陈梦 淡娟君 郭鹏程[2] 张浩 孙龙刚 刘磊 孙帅辉[2] CHEN Meng;DAN Juan-jun;GUO Peng-cheng;ZHANG Hao;SUN Long-gang;LIU Lei;SUN Shuai-hui(Shaanxi Provincial Dongzhuang Water Conservancy Engineering Co.,Ltd.,Xi’an 713200,China;School of Water Resources and Hydroelectric Engineering,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]陕西省东庄水利枢纽工程建设有限责任公司,陕西西安713200 [2]西安理工大学水利水电学院,陕西西安710048

出　　处：《水电能源科学》2025年第4期203-207,共5页Water Resources and Power

基　　金：陕西省水利厅科技计划项目(2023slkj-3)。

摘　　要：长期输送含沙流体的管道因泥沙颗粒冲蚀而导致局部变形、坑蚀甚至裂纹,影响系统运行安全。为量化分析管道磨损深度变化,采用冲蚀-动网格耦合方法,通过数值研究分析90°弯管在运行1、20、40、60 h后的冲蚀变形量。该方法利用自适应时间步长内的壁面冲蚀率更新网格位置,从而更精确地量化磨损变形。结果显示,随着时间增加,最大冲蚀率和最大冲蚀深度呈非线性增长。每延长20 h,最大冲蚀深度增加约1 mm,壁面最大冲蚀率缓慢增长,但高冲蚀率区迅速向下游转移。冲蚀60 h后,壁面最大冲蚀率增加1.5倍,最强冲蚀位置向下游偏移8°。此外,弯管最大磨损深度及其位置受颗粒运动速度和撞击角度的影响较大,而受颗粒堆积率的影响较小。研究结果可定量预测壁面的渐进磨损特性,并为管道磨损量化分析提供基础。Pipelines transporting sediment-laden fluids are prone to localized deformation,pitting,and even cracking due to the erosion caused by sediment particles,thereby compromising system safety.To quantitatively analyze the variation in pipeline wear depth,this study employs an erosion dynamic mesh coupling method to numerically investigate the erosion deformation of a 90°bend pipe after 1,20,40,and 60 hours of operation.This approach updates the mesh position based on the wall erosion rate within an adaptive time step,allowing for a more precise quantification of wear deformation.The results indicate that both the maximum erosion rate and maximum erosion depth increase nonlinearly with increase of time.For every 20 hours,the maximum erosion depth increases by approximately 1 mm,and the maximum wall erosion rate grows slowly,but high erosion rate zones rapidly shift downstream.After 60 hours of erosion,the wall maximum erosion rate increases by 1.5 times,and the most severe erosion position shifts 8°to the downstream.Furthermore,the maximum wear depth and its location in the bend are significantly influenced by the particle velocity and impact angle,while the effect of particle accumulation rate is relatively small.The research findings can quantitatively predict the progressive wear characteristics of the wall and provide a foundation for the quantitative analysis of pipeline wear.

关 键 词：冲蚀-动网格耦合 冲蚀深度 冲蚀率 量化分析 

分 类 号：TV732.44[水利工程—水利水电工程]