初始浑水含沙量对沉淀池中流速分布的影响  

Influence of Initial Muddy Water Sediment Concentration on Flow Velocity Distribution in Sedimentation Tank

作　　者：陶洪飞[1] 马英杰[1] 洪明[1] 付秋萍[1] 赵经华[1] 马亮[1] 郑文强[1] 万易东 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052

出　　处：《水电能源科学》2017年第4期120-123,62,共5页Water Resources and Power

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)

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。In order to study the influence of initial muddy water sediment concentration on flow velocity distribution in the sedimentation tank of the gravity sinking and filter tank for drip irrigation with river water（GSFTDIRW）, two phase flow field of water-sediment was simulated under the five different initial muddy water sediment concentrations. By comparing and analyzing the distribution of velocity along flow direction and water depth direction under different initial muddy water sediment concentration, it can be seen that the change of muddy water velocity along the flow direction is different from that in the water depth. But the greater initial muddy sediment concentration is, the greater velocity along the flow direction and water depth increases or decreases, the easier forming reflux in sedimentation tank is. Thereby, part of sediment move with water out of the sedimentation tank. So, the efficiency of water-sediment separation is reduced.

关 键 词：河水滴灌重力沉沙过滤池 数值模拟 含沙量 流场 

分 类 号：TV14[水利工程—水力学及河流动力学]