排灌机械工程学报2013，Vol.31Issue(5)：449-455,7.DOI:10.3969/j.issn.1674-8530.2013.05.015
迷宫流道齿转角与齿间距对滴头性能的影响
Effect of tooth angle and pitch of labyrinth channel on performance of emitter
摘要
Abstract
An emitter with labyrinth channel was used as the study model,the channels were designed by using a full factorial experiment for two factors with four levels,the liquid-solid two-phase flows in them were simulated numerically by means of Fluent 6.3.Influences of tooth angle and pitch on the hydraulic and anti-clog performances of emitter were explored.The results showed that discharge coefficient can be correlated to tooth angle and pith with a positive relationship; moreover,the discharge coefficient increases with increasing tooth angle and pitch.The influences of tooth angle are more complicated ; when the tooth angle is more than 120°,the flow regime index decreases initially then increases with increasing tooth pitch; when the tooth angle is less than 120°,however,the index decreases firstly,then increases with increasing tooth pitch.It was proposed that the anti-clog performance can be analyzed by certain range of suspended sand particle concentration.The level of the maximum particle concentration in the channel is not completely proportional to the size of the area of high concentration,but the higher the maximum concentration,the greater chance the suspended particles to gather together and the greater the probability that a local sediment happens; at last the size of the area of high concentration gets larger and the emitter becomes clogged more easily.关键词
滴头/迷宫流道/齿转角/齿间距/抗堵塞性能/水力性能Key words
emitter/ labyrinth channels / tooth angle / inter-tooth space / anti-clogging performance /hydraulic performance分类
农业科技引用本文复制引用
谢巧丽,牛文全,李连忠..迷宫流道齿转角与齿间距对滴头性能的影响[J].排灌机械工程学报,2013,31(5):449-455,7.基金项目
国家863计划项目(2011AA100507) （2011AA100507）
