微灌用叠片过滤器全流场数值模拟与优化分析  

Numerical Simulation and Optimization of Micro Irrigation Disc Filter

作　　者：李浩[1,2] 李红[2] 黄修桥[1] 韩启彪[1] 张娟娟[1] 孙浩[1] 李文[1] 

机构地区：[1]中国农业科学院农田灌溉研究所/河南省节水农业重点实验室,河南新乡450002 [2]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013

出　　处：《灌溉排水学报》2016年第6期1-5,47,共6页Journal of Irrigation and Drainage

基　　金："十二五"农村领域国家科技支撑计划课题(2014BAD12B05;2012BAD08B02);国家高技术研究发展计划(863计划)资助项目(2011AA100507);中国农业科学院科技创新工程团队农田灌溉研究所"节水高效灌溉技术与装备"项目

摘　　要：为准确捕捉微灌用叠片过滤器内部不稳定流场的流动规律,基于多孔介质模型,利用计算流体力学(CFD)技术、雷诺时均法和标准k-ε模型,进行了叠片过滤器清水介质下全流场三维数值模拟,并设置了对比试验。结果表明,基于多孔介质模型的计算流体力学方法对叠片过滤器的数值模拟精度较高,该种方法的数值模拟结果与试验结果较吻合,可以准确地预测过滤器水力性能。过滤器进出口管路与滤筒间的夹角α使过滤器产生压力损失,且α在30°左右时过滤器内部流动状态最好,压力损失最小。因此,该型过滤器进出口管路与滤筒间的最佳角度为30°左右。To accurately capture internal unstable flow rules of the micro irrigation disc filter and provide a theoretical basis for the optimization of the structure,a whole flow field numerical simulation of the disc filter was carried out using the Computational Fluid Dynamics（CFD）technology,based on the Reynolds time-average equations,the standard k ε model as well as the porous medium model,and an experimental research was done.The results showed that the CFD method of disc filter numerical simulation based on porous medium model was more accuracy,and the simulation results and the experimental results were in good agreement,which could accurately predict the filter＇s hydraulic performance.At the same time,it was found that theα,which was the angle of the filter＇s import and export pipeline and the filter cartridge,was one of the reasons for the filter＇s pressure loss;whenαwas about 30°,the internal flow state of the filter was the best,and pressure loss was the minimum.

关 键 词：叠片过滤器 多孔介质 CFD 结构优化 

分 类 号：S275.5[农业科学—农业水土工程]