摘要
介绍了一种新型旋转式喷头——双喷嘴射流喷头结构形式和工作原理.首先对进水口公称直径为10 mm的射流喷头进行数值模拟研究,得到了主喷嘴和副喷嘴出口的压力和流量变化和射流脉冲频率.通过对宏观和微观条件下的喷头内部流动进行研究,分析了射流喷头的工作机理,主要有控制管内压力水流的流动状态和射流空间的低压涡流的变换过程.对双喷嘴射流喷头的射程进行初步试验研究,在0.05~0.25 MPa条件下,选用6.0,4.0,2.5,1.5 mm的喷嘴进行组合喷灌,结果表明射流喷头的射程范围为6~16 m,射程最远的为喷嘴直径4.0 mm×2.5mm的射流喷头,其次为喷嘴直径2.5 mm×1.5 mm的射流喷头,射程最近的为喷嘴直径6.0 mm×6.0 mm的射流喷头,喷头的射程能满足喷灌要求.
A new kind of sprinkler--double-nozzle jet sprinkler was developed, and its structure and working principle were introduced. First of all, the numerical simulation of jet sprinkler, with 10 mm nominal diameter of inlet was conducted. The working mechanism of the jet sprinkler was analyzed by studying the internal flow under macro and micro conditions, which mainly includes the flow state of the pressure flow in the control pipe and the transformation process of the low-pressure eddy current in the jet space. The radius of double-nozzle jet sprinkler was studied, and under the condition of 0.05 - 0.25 MPa, the combined spray irrigation was carried out with nozzles of 6.0,4.0,2.5 and 1.5 mm. The results show that the radius of double-nozzle jet sprinkler has a range of 6 m to 16 m, the furthest radius is the jet sprinkler with 4.0 mm × 2.5 mm nozzle diameter and the nearest radius is the jet sprinkler with 6.0 mm × 6.0 mm nozzle diameter, followed by the jet sprinkler with 2.5 mm ×1.5 mm nozzle diameter. The sprinkler radius can meet the requirement of sprinkler iri＇igation.
作者
徐胜荣
王新坤
肖思强
樊二东
张晨曦
薛子龙
王轩
XU Shengrong;WANG Xinkun;XIAO Siqiang;FAN Erdong;ZHANG Chenxi;XUE Zilong;WANG Xuan(National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China)
出处
《排灌机械工程学报》
EI
CSCD
北大核心
2018年第10期981-984,1052,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金资助项目(51579116)
江苏省水利科技项目(2017055)
关键词
双喷嘴射流喷头
数值模拟
内部流动
工作机理
射程试验
double-nozzle jet sprinkler
numerical simulation
internal flow
working mechanism
radius experiment
