不同流量下泵前微压网式过滤器内部流场的数值模拟  

Numerical Simulation of the Flow Field Inside a Micro-Pressure Mesh Filter in Front of a Pump at Different Flow Rates

作　　者：陈领伟 陶洪飞[1,2] 马合木江·艾合买提 李巧[1,2] 姜有为 CHEN Ling-wei;TAO Hong-fei;AIHEMAITI Ma-he-mu-jiang;LI Qiao;JIANG You-wei(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Key Laboratory of Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆水利工程安全与水灾害防治重点实验室,乌鲁木齐830052

出　　处：《节水灌溉》2024年第5期59-65,共7页Water Saving Irrigation

基　　金：国家自然科学基金项目(52369013);新疆维吾尔自治区重大科技专项项目(2022A02003-4)。

摘　　要：泵前微压网式过滤器作为一种新型的灌溉过滤装置,具有结构简单、适配性高以及能耗低等优点。为了探究泵前微压网式过滤器内部流场的运行状态,采用了物理模型试验、数值计算及理论分析的方法,从微观角度对清水条件下泵前微压网式过滤器在不同流量(5、8、11、14、17 m^(3)/h)的水力性能和水流运动状态进行分析。结果表明:标准k-ε模型可作为模拟泵前微压网式过滤器清水流场的湍流模型;滤网内部流速分布不均匀,随流量呈现不同形态的“火烛”形态,出水口对过滤器内部影响范围随流量增加而增大;过滤器内部同时出现高压区和负压区,滤网底部为水头损失主要发生位置。研究成果可为泵前过滤设备的浑水数值模拟和结构优化提供理论和技术支撑。As a novel type of irrigation filtration device,the pre-pump micro-pressure mesh filter has the advantages of simple structure,high adaptability and low energy consumption.To investigate the operation state of the internal flow field of the pre-pump micro-pressure mesh filter,this paper adopts the methods of physical model test,numerical calculation and theoretical analysis to analyze the hydraulic performance and water movement state of the pre-pump micro-pressure mesh filter at different flow rates(5,8,11,14 and 17 m^(3)/h)under the condition of clear water from a microscopic point of view.The results indicate that the standard k-εmodel can be used as a turbulence model to simulate the clear-water flow field of the pre-pump micro-pressure mesh filter.The flow velocity distribution inside the filter mesh is not uniform,and presents different forms of"fire candle"morphology with the flow rate.The range of influence of the outlet on the inside of the filter increases with the increase of flow rate.High-pressure and negative-pressure areas appear simultaneously inside the filter,and the bottom of the screen is the main location of head loss.The research results can provide theoretical and technical support for the numerical simulation and structural optimization of turbid water in the pre-pump filtration equipment.

关 键 词：泵前微压过滤器 水头损失 数值模拟 云图 

分 类 号：S275.6[农业科学—农业水土工程]