基于网式过滤器滤网过滤两种模型的流场模拟分析  

Flow field simulation analysis based on two models of mesh filter

作　　者：刘冬冬 刘贞姬[1] 谢炎 Seyed Farshid Chini 杨昊 雷辰宇 LIU Dongdong;LIU Zhenji;XIE Yan;Seyed Farshid Chini;YANG Hao;LEI Chenyu(College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi,Xinjiang 832003,China;School of Mechanical Engineering,College of Engineering,University of Tehran,Tehran 1417613131,Iran)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832003 [2]德黑兰大学工程学院机械工程系,德黑兰1417613131,伊朗

出　　处：《干旱地区农业研究》2023年第2期130-140,共11页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金(12162030,11662018)。

摘　　要：为探究滤网模型对网式过滤器流场的影响,对翻板网式过滤器采用CFD软件模拟计算不同过滤流速下两种不同形式滤网模型,将两种滤网模型的模拟值与试验值进行对比,并对滤网内部流场和压强场进行分析。结果表明:多孔阶跃模型具有计算耗时少、效率高的特点,多孔阶跃模型在模拟的耗时数值上约为三维滤网简化模型的1/6;多孔阶跃模型和三维滤网简化模型的流场和压强沿x轴都呈现逐渐减小的变化趋势;分析多孔介质交界面流速和压强的模拟数值,发现三维滤网简化模型能较好地模拟出多孔介质网孔结构阻挡作用和微观孔道的流动规律;三维滤网简化模型可以较好地还原介质结构参数对水头损失的影响而多孔阶跃模型能较好地还原介质过流量与水头损失的关系。研究可为实际工程中综合考虑介质特性选取高精度、高效率模型提供参考。To explore the influence of the filter model on the flow field of the mesh filter,this study used CFD software to simulate and calculate two different types of filter models under different filtration flow rates for the flap mesh filter.The test values were compared,and the flow field and pressure field inside the filter screen were analyzed.The results showed that the porous step model had the characteristics of less time-consuming and high efficiency,and the time-consuming value of the porous step model was about 1/6 of that of the simplified three-dimensional filter model.The flow field and pressure along the x-axis of the porous step model and the three-dimensional filter simplified model showed a gradually decreasing trend.Analyzing the simulation values of flow velocity and pressure at the interface of porous media found that the simplified three-dimensional filter model simulated better the blocking effect of the mesh structure of porous media in engineering.The three-dimensional filter simplified model reduced better the influence of the medium structure parameters on the head loss.The porous step model worked better to reduce the relationship between the medium overflow and the head loss.This research can provide a reference for the selection of high-precision and high-efficiency models considering the characteristics of media in practical engineering.

关 键 词：网式过滤器 数值模拟 多孔阶跃模型 三维滤网简化模型 流速场 压强场 

分 类 号：S277.9[农业科学—农业水土工程]