带导流壳的污水处理搅拌机流动分析与试验

Flow Analysis and Measurement of Wastewater Treatment Mixer with Dome

利用Fluent 6.3计算流体力学软件,对带导流壳的污水处理搅拌机搅拌的污水处理池进行了数值模拟,分析了全池内流体的流场。并对污水处理搅拌池内流体流场分布进行了试验研究,通过空间布点测量了污水处理池内不同位置流体速度。利用Excel软件绘制了污水处理搅拌池内不同位置的截面上的流体速度分布图,分析了池内流体速度分布规律。数值模拟与试验结果均得出相同的结果。流体速度沿着轴向传递明显,流体径向扩散相对较小,且污水处理池内流体的流速基本沿污水处理搅拌机轴呈轴对称分布。结果表明:该污水处理搅拌机具有明显的轴向导流且减少池壁边界对池内流体影响的作用。

To study the performance of wastewater-treatment mixer because of its large application in the rural environmental governance,based on CFD,using Fluent 6.3,wastewater treatment mixer with dome was simulated.At the same time,the velocity flow field distribution in the wastewater treatment pool was experimentally studied,and the fluid velocity at the different points of the pool was measured by using the velocity instrument.The velocity distribution graphs of the different sections in the wastewater treatment pool were drawn by software Excel,and the velocity distribution rule was analyzed.The same results were obtained by the numerical simulation and experiment.The fluid flow obviously transferred along the axial direction of wastewater-treatment mixer but little diffused along the radial direction,and fluid velocity symmetrical along the mixer axis.The results indicate that the wastewater-treatment mixer can guide flow in axial direction,and can reduce the effect of boundary of pool wall on the fluid in pool.