基于CFD及FEM的某分水口拦漂导流设备性能分析

Analysis on the Performance of Drift Blocking and Diversion Device at Water Diversions Based on CFD and FEM

为了研究多孔板的流体动力性,借助多孔介质模型、Darcy定律和最小二乘法搭建了可计算的复杂透水导流板的CFD数值计算模型,并分析了多孔介质模型和实体孔板模型的异同,对比显示:采用多孔介质模型具有一定的合理性和可行性。在此基础上,构建了包含多孔介质模型的全尺寸分水口渠道流固耦合模型,数值计算结果表明:支撑桁架能够满足强度的要求;最大位移为3.25 mm,能够保证多孔透水导流板的平整性。分水口中回流区的存在,使该拦漂导流设备在阻拦一定体积的污物进入分水口的同时,还具有一定的自清洁能力。

In order to study the hydrodynamic characteristics of porous plate,a CFD numerical calculation model of the complex pervious deflector can be established by the porous medium model,Darcy's law and least squares method.The similarities and differences between the porous medium model and threedimensional orifice plate were analyzed.The comparison showed that the porous medium model had certain rationality and feasibility.On this basis,a fluidsolid coupling model of a fullscale water channel with a porous medium model was established.The numerical results show that the support truss can meet the strength requirements;the maximum displacement is 3.25 mm,which can ensure the porous permeable deflector flatness.Moreover,the existence of a reversed flow in the water diversions enables the drifting diversion device to have a certain selfcleaning ability while blocking a certain volume of dirt entering the water outlet.