基于非旋转折射式喷头的射流三通结构优化  

Optimization of jet tee structure based on non-rotating refractive nozzle

作　　者：袁巍巍 王新坤[1] 颜海兰 赵擎 陈亚奇 贾宗瑾 YUAN Weiwei;WANG Xinkun;YAN Hailan;ZHAO Qing;CHEN Yaqi;JIA Zongjin(National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]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：《排灌机械工程学报》2025年第2期209-216,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：山东省重点研发计划项目(2020CXGC10807)。

摘　　要：为了提高适用于非旋转折射式喷头的射流三通的脉冲特性,采用正交设计方法,选取喷嘴宽度、位差、劈距和侧壁倾角4个因素,每个因素取5个水平参数,设计了共25组不同结构的射流三通模型.采用CFX数值模拟软件,对25组模型进行CFD数值模拟计算,以水头振幅和水头损失为性能评价指标,确定各因素对射流三通的影响性能指标主次顺序和最优结构尺寸模型.对比优化模型与普通模型的脉冲特性,模拟结果表明优化模型的水头振幅提高了0~16.73 kPa,水头损失降低了0~3.34 kPa.通过水力性能试验发现,与普通三通相比,在工作压力0.10,0.15和0.20 MPa下,射流三通条件下折射式喷头喷灌强度峰值降低了41.50~69.07 mm/h,同时改善了其近处水量分布.通过Surfer软件对单喷头水量进行叠加来计算喷头组合喷灌均匀性系数,发现与普通三通相比,在喷头安装间距2.0,2.5,3.0 m下,射流三通条件下折射式喷头组合喷灌均匀性系数提高了1.7%~23.1%.In order to improve the pulse characteristics of the jet tee suitable for non-rotating refractive nozzle,an orthogonal design method was adopted and used to select 4 factors:nozzle width,position difference,laying length,and side wall angle.Each factor had 5 horizontal parameter levels,and a total of 25 different structural models of the jet tee were designed.CFX numerical simulation software was used to carry out CFD numerical simulation calculations on 25 groups of jet tee models.The head amplitude and head loss were taken as performance evaluation indicators to determine the primary and secondary order of influence of each factor on performance indicators and the optimal structural size model.Comparing the pulse characteristics of the optimized model with those of the ordinary model,the simulation results show that the head amplitude of the optimized model is increased by 0-16.73 kPa,and the head loss is decreased by 0-3.34 kPa.After hydraulic performance tests,the results indicate that under working pressures of 0.10,0.15,and 0.20 MPa,compared to regular tees,the peak sprinkler intensity of the refraction sprinkler is reduced by 41.50-69.07 mm/h under jet tee conditions,while also improving water distribution near the sprinkler.The uniformity coefficient of sprinkler combination was calculated by superimposing the water volume of a single sprinkler through Surfer software.The results show that compared to regular tees,the refraction sprinkler combination under jet tee conditions can increase the irrigation uniformity coefficient by 1.7%-23.1%at sprinkler spacings of 2.0,2.5,and 3.0 m.

关 键 词：射流三通 折射式喷头 正交设计 水力性能 喷灌均匀性系数 

分 类 号：S277.94[农业科学—农业水土工程]