摘要
根据滴灌实际运行情况,采用分段粒径浑水持续灌溉的试验方法,分析了泥沙颗粒粒径及进口压力对迷宫式流道滴头的流量、均匀度及堵塞的影响。结果表明：在粒径小于0.125mm的泥沙颗粒中,较小颗粒的制紊效应要大于较大颗粒的制紊效应,泥沙颗粒粒径及进口压力均是影响灌溉均匀度的因素;含沙量较低时（0.5g/L）,粒径是影响滴头堵塞的主要因素,在0.030 8~0.125mm粒径范围内,粒径较小时更容易引起堵塞,进口压力不同时容易引起堵塞的敏感粒径范围不同,压力为0.15及0.105MPa时,敏感粒径为0.045~0.075mm,进口压力降至0.075MPa后,敏感粒径为0.0308~0.045mm;连续灌溉条件下压力不是影响滴头堵塞的主要因素。
According to the actual situation of drip irrigation, the influences of sediment size distribution and inlet pressure on irriga- tion uniformity, flow and clogging of labyrinth-path emitters were investigated through the method of muddy water continued irriga- tion. The result showed that turbulence effects caused by smaller particles was more distinguished than bigger ones; both sediment size distribution and inlet pressure were the factors that affected irrigation uniformity when the particle sized in muddy water were less than 0. 125 ram; sediment particle size was the main factor of emitter dogging with low sediment concentrations; emitter clog- ging would be caused more easily by smaller particles; different inlet pressures correspond to different sensitive size that caused emit- ter clogging easily; size sensitive is from 0. 045 to 0. 075 mm at the pressure 0. 150 and 0. 105 MPa, while from 0. 030 8 to 0. 045 mm at the pressure 0. 075; inlet pressure was not the main factor which cause the emitter clogging by continuous irrigation.
出处
《节水灌溉》
北大核心
2014年第10期18-21,共4页
Water Saving Irrigation
基金
"十二五"科技支撑项目(2011BAD29B02)
国家自然科学基金项目(50909083
51179163)
中央高校基本科研业务专项资金资助(QN2011127)
关键词
滴头
灌溉均匀度
堵塞
进口压力
泥沙粒径
emitter
irrigation uniformity
clogging
nlet pressure
sediment particle size
作者简介
王心阳（1989-），女，硕士研究生，主要从事农业水土工程方面的研究工作。E—mailzuozuoyang89@126．com。
王文娥（1975-），女，副教授，硕士生导师，主要从事节水灌溉技术、流体机械及排灌设备等方面的研究。E—mailwangwene@nwsuaf.edu.cn.
