基于CFD-DPM模型的T型网式过滤器冲蚀特性模拟与分析  

Simulations and analysis of erosion characteristics of T-type screen filters based on CFD-DPM model

作　　者：项旭东 张钟莉莉 曾揭峰 郑强 杨培岭[1] XIANG Xudong;ZHANG Zhonglili;ZENG Jiefeng;ZHENG Qiang;YANG Peiling(College of Hydraulic and Civil Engineering,China Agricultural University,Beijing 100083,China;Intelligent Equipment Technology Research Center,Beijing Academy of Agriculture and Forestry Science,Beijing 100083,China)

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]北京市农林科学院智能装备技术研究中心,北京100083

出　　处：《排灌机械工程学报》2024年第9期900-906,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家重点研发计划项目(2019YFC0400700)。

摘　　要：为分析滤网冲蚀情况,采用多孔阶跃模型和滤网缩尺模型,结合CFD-DPM两相流模型通过主因素分析方法对滤网冲蚀速率规律进行数值模拟分析与预测,探求整体不同区域滤网的冲蚀效应情况,并通过基于正交试验的多因素主效应分析得出各因素对最大冲蚀速率的影响显著性大小.结果表明:在一定范围内最大冲蚀速率与颗粒粒径呈负相关而与质量流率、流速呈正相关;滤网表面中滤孔面普遍比迎水面更易受冲蚀破坏,背水面几乎不受冲蚀影响;颗粒粒径、质量流率对冲蚀高发区域范围大小影响较小(面积增幅为15.0%~16.7%),而流速对其影响较明显(面积增幅为50.0%);显著性检验中,流速、质量流率、颗粒粒径对最大冲蚀速率的P值分别为0.01280,0.00269和3.712×10^(-9),均呈显著性相关.The porous jump model and simplified filter screen model were used to combine CFD-DPM two-phase flow model to numerically simulate and predict the erosion rate of the screen by a single-factor approach to explore the overall erosion effect of different areas of the screen.The significance of the effect of each factor on the maximum erosion rate was obtained through a multi-factor main effects analysis based on an orthogonal test.The results show that the maximum erosion rate in a certain range is negatively correlated with the particle size and positively correlated with the mass flow rate and flow velocity.The wall surface of the filter pore is generally more susceptible to erosion damage than the headwater surface,while the backwater surface is almost unaffected by erosion.The effect of particle size and mass flow rate on the size of the area of high erosion incidence is relatively small(area increase of 15.0%-16.7%),while the effect of flow velocity is more significant(with an area increase of 50.0%).The filter screen near the bottom of the outlet pipe has a higher risk of erosion damage because the flow rate is significantly higher than other filter screens.The probability values of flow rate,mass flow rate,and particle size for the maximum erosion rate are of 0.01280,0.00269,and 3.712×10^(-9) respectively,and all show significant correlations.

关 键 词：网式过滤器 DPM模型 冲蚀速率 显著性分析 正交试验 

分 类 号：S277.9[农业科学—农业水土工程]