干旱地区农业研究2017，Vol.35Issue(2)：176-181,6.DOI:10.7606/j.issn.1000-7601.2017.02.28
回流滴灌系统毛管泥沙输移规律模拟及实验研究
Simulation and experimental study on lateral sediment transport in drip irrigation with return pipe
摘要
Abstract
In order to explore the sediment transport potentials of lateral in drip irrigation system with retum pipe,this paper utilized the numerical method by CFD and intermittent drip irrigation method to study the movement regulation of sand particles and movement state of liquid-solid two-phase flow in lateral.The result showed that with the increase of flow velocity in lateral,the number of particles enter into emitter reduced significantly;when the flow rate is 0.05 ～ 0.2 m·s-1,the turbulence intensity and turbulence region in the lateral were reduced with the increase of flow velocity.When the flow rate is 0.2 ～ 0.4 m· s-1,the increase of flow rate has no obvious effect on the change of water flow state.When the return pipe is arranged at the end of lateral to increase flow velocity,the number of particles outflow from emitter is reduced by about 30％.When the flow rate of return pipe is 0.1 m· s-1,the irrigation period of three kinds of emitter was improved by 50％,38％ and 41％ respectively.These results indicate that to improve the flow rate of lateral can significantly improve the transport capacity of sand,increase the running time of drip irrigation system,reduce the requirements for water treatment facilities.关键词
泥沙输移/滴头堵塞/CFD模拟/回流管/毛管流速Key words
sand movement/emitter clogging/CFD/return pipe/flow rate of lateral pipe分类
农业科技引用本文复制引用
卢金锁,路泽星,于健,史吉刚..回流滴灌系统毛管泥沙输移规律模拟及实验研究[J].干旱地区农业研究,2017,35(2):176-181,6.基金项目
内蒙古自治区重大水利科技专项(2014-117) （2014-117）
