管道内泥沙粗颗粒冲淤过程的数值模拟  

Numerical Investigation of Coarse Sediment Particle Self-cleaning Process in a Pipe

作　　者：谢润瑜 韩迅 Xie Runyu;Han Xun(State Key Laboratory of Hydraulics and Mountain River Engineering,Chengdu 610065,China)

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《科学技术创新》2022年第9期21-24,共4页Scientific and Technological Innovation

基　　金：国家自然科学基金青年项目《淹没透水丁坝周围三维水沙运动及致损机理研究》,项目编号:51909179;四川省科技厅项目《山区河流暴雨洪水过程泥沙污染物耦合迁移规律及环境影响效应研究》,项目编号:2021YFH0044。

摘　　要：近年来,我国城市暴雨洪涝灾害不断加剧,为建立更为完善的城市管道自净系统,对城市排水管道水力清淤的研究愈发重要。该文基于颗粒离散元法和点球浸没边界法对管道内泥沙粗颗粒冲淤过程进行模拟,首先采用三个算例对(CgLES_Ycode)代码模型进行验证,随后研究了不同流速条件下管道内泥沙颗粒运动,讨论了沉积沙床的侵蚀情况和冲淤效果,最后将模拟的现象结合工程手册进行了分析。In recent years,Urban rainstorm and flood disasters are continually aggravating in China.In order to establish a better urban pipeline self-cleaning system,the research on hydraulic desilting of urban drainage pipeline is becoming increasingly important.This paper simulates the self-cleaning process of coarse sediment particles in a pipe based on the particle discrete element method and point-particle immersion boundary method.Firstly,three numerical examples are used to verify the correctness of this code model(cgles_ycode).Then,the movement of sediment particles in a pipe under different velocity conditions is studied,while the erosion and self-cleaning process of sediment bed are detailly discussed.At last,the simulated phenomenon is analyzed by comparing with the relevant engineering manual.

关 键 词：沉积沙床 颗粒运动 管道冲淤 点球浸没边界法 

分 类 号：TV148.1[水利工程—水力学及河流动力学]