初始浑水含沙量对沉淀池中流速分布的影响

发布时间：2018-04-05 23:03

本文选题：河水滴灌重力沉沙过滤池　切入点：数值模拟　出处：《水电能源科学》2017年04期

【摘要】：为研究初始浑水含沙量对河水滴灌重力沉沙过滤池中沉淀池内流速分布规律的影响,对5种不同初始浑水含沙量下沉淀池内的水沙两相流流场进行了数值模拟。通过对比分析不同初始浑水含沙量下流速沿水流方向和沿水深方向的分布规律,可知不同初始浑水含沙量下浑水流速沿水流方向变化规律与水深方向不同;但初始浑水含沙量越大,流速沿水流和水深方向增加或减小的幅度也就越大,越容易在沉淀池尾部形成较大回流,从而导致水流将部分泥沙带出沉淀池,使沉淀池的水沙分离效率降低。
[Abstract]:In order to study the effect of initial muddy water sediment content on the velocity distribution of sedimentation tank in gravity sediment sink of river drip irrigation, the flow field of water and sediment two-phase flow in sedimentation tank was numerically simulated under five different initial muddy water sediment contents.By comparing and analyzing the distribution of velocity along the direction of flow and along the direction of water depth under different initial sediment content of muddy water, it can be concluded that the variation of velocity of muddy water along the direction of flow and the direction of water depth are different under different initial sediment content of muddy water.However, the greater the sediment content in the initial muddy water, the greater the increase or decrease of the velocity along the direction of flow and water depth, and the easier it is to form a larger backflow at the end of the sedimentation tank, thus causing the flow to bring some sediment out of the sedimentation tank.The water and sediment separation efficiency of the sedimentation tank is reduced.
【作者单位】：新疆农业大学水利与土木工程学院;
【基金】：新疆农业大学博士后经费项目;新疆农业大学教研教改项目国家科技支撑计划项目(2011Bad29B05) 新疆水利水电工程重点学科基金项目(xjslgczdxk20101202) 复合应用型农林人才培养模式改革试点(农业水利工程)项目 2016年校级大学生创新项目(201610758087)
【分类号】：S275.6;TV673.1

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