基于CFD的网格絮凝池内水流紊动协同效应分析

发布时间：2018-02-13 08:23

本文关键词： 计算流体力学网格絮凝池涡旋尺寸絮凝效果水力优化　出处：《湖南师范大学自然科学学报》2017年04期 　论文类型：期刊论文

【摘要】：借助CFD方法对网格絮凝池内的流场进行数值模拟,并结合紊流涡旋理论和絮体多级成长模型,从水流速度分布、紊动能和紊动能耗散率等角度考察不同网格板的开孔率和间距以及过水孔洞的尺寸等条件下整个池内水流紊动的相互作用.研究发现,前述各因素对流场的影响均局限于一定的区域范围,但考虑到絮凝任何阶段水动力学环境的变化都会导致最终形成絮体性能的差异,故在实际构筑物设计时,应充分利用不同分段水流紊动间的协同效应,通过确定适宜的设计参数组合来实现絮凝效果的优化.
[Abstract]:The flow field is simulated by the CFD method of the grid flocculation tank, and combined with the turbulent vortex theory and floc multilevel growth model, from the distribution of flow velocity, turbulent flow interaction of the pool turbulence kinetic energy and turbulence dissipation rate perspective to study the different grid plate opening rate and spacing and water holes size and other conditions. The study found that the influence of various factors on the flow field are limited to a certain region wide, but considering the change of water environment at any stage of flocculation dynamics will lead to differences in the final formation of floc properties, so the actual building design, should make full use of the synergistic effect of different segments of turbulent flow the optimization of design parameters by determining a suitable combination to achieve the effect of flocculation.

【作者单位】：湖南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51308199) 湖南省自然科学基金资助项目(2015JJ6021)
【分类号】：TU991.22;TV131.3

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