旋转折射式喷头水量分布与喷灌均匀性试验  

Experiment of Water Distribution and Uniformity of Rotating Plate Sprinkler

作　　者：朱兴业[1] 万景红 ALEXANDER Fordjour 张林国 袁寿其[1] ZHU Xingye;WAN Jinghong;ALEXANDER Fordjour;ZHANG Linguo;YUAN Shouqi(Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China;Department of Civil Engineering,Koforidua Technical University,Koforidua,Eastern Region 999064,Ghana)

机构地区：[1]江苏大学流体机械工程技术研究中心,镇江212013 [2]知识技能大学土木工程学院,东部999064

出　　处：《农业机械学报》2018年第8期145-152,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点研发计划项目(2016YFC0400202); 江苏省重点研发计划(现代农业)项目(BE2015316); 中国博士后特别项目(2016T90428); 江苏高校优势学科建设工程项目(PAPD)

摘　　要：为了研究喷头工作压力、喷嘴直径和安装间距对喷灌喷洒水深和喷灌均匀度的影响规律,选用喷嘴直径为2.98、3.37、3.77 mm的R3000型旋转式喷盘的折射式喷头进行了研究。测量了3种喷头在0.1、0.2、0.3 MPa工作压力下的径向水量分布,喷灌强度随着喷头工作压力或喷嘴直径的增加而增大。叠加计算了安装间距为2、3、4、5、6 m几种情况下的组合均匀性系数,并通过组合试验与计算结果进行对比,得出组合均匀性系数试验值与模拟计算值的误差在0.5%~11.0%之间,影响因素的主次顺序为喷头安装间距、工作压力、喷嘴直径。结果表明:喷嘴流量系数平均值在0.9以上,说明喷头的性能良好。3种喷嘴的最佳喷灌均匀性系数分别为75.9%、78.2%和85.1%。提出了自制R3000型旋转折射式喷头最佳组合间距为4 m的计算均匀性系数经验公式,为其在工程中的应用提供了理论数据。To study the effect of working pressure,nozzle diameter and installation spacing on the hydraulic performance of spray depth and uniformity coefficient in sprinkler irrigation,a new typed rotating plate sprinkler was put forward. The nozzle diameters of 2. 98 mm,3. 37 mm and 3. 77 mm were chosen to carry out the research. The radial water distributions were measured at the working pressure of0. 1 MPa,0. 2 MPa and 0. 3 MPa. It was found that the irrigation intensity was increased with the increase of nozzle operating pressure or nozzle diameter. The combined uniformity coefficient were calculated with the installation spacing of 2 m,3 m,4 m,5 m and 6 m. The calculation results were compared with the testing experiments. The error value between the tested and simulated results of the combined uniformity coefficient was within 0. 5% ~ 11. 0%,and the importance order of influencing factors was installation spacing,working pressure and nozzle diameter. The results showed that the average nozzle discharge coefficient was more than 0. 9,which indicated that the new typed sprinkler had good performance; the optimum irrigation uniformity coefficients of three kinds of nozzles were 75. 9%,78. 2% and 85. 1%,respectively. The optimum installation spacing of 4 m for a new typed R3000 rotating plate sprinkler and an empirical formula for the calculation of uniformity coefficient was proposed,which provided important theoretical data for its engineering application.

关 键 词：旋转折射式喷头 工作压力 喷嘴直径 安装间距 喷灌均匀系数 试验 

分 类 号：S275.5[农业科学—农业水土工程]