水利学报Issue(5)：602-611,10.DOI:10.13243/j.cnki.slxb.20141110
基于量纲分析的内镶圆柱式毛管局部水头损失研究
Dimensional analysis for estimating the local head losses in trickle laterals equipped with integrated in-line emitters
摘要
Abstract
To study the local head loss in trickle laterals lines equipped with integrated in-line emitters rule, water filling tests were conducted in this study on 4 kinds of common drip irrigation pipes, and the CFD software was also used to numerical simulation and verification. On this basis,12 kinds of drip irriga⁃tion pipes with different treatments were simulated to study the factors of local head loss in trickle laterals by dimensional analysis. The results show that the values of simulation are in good with the experimental data for total head loss of lateral. Local head loss of trickle laterals is related with inner diameter of later⁃al,inner diameter of emitter,emitter length,water flow velocity,and viscosity of water movement. The ratio of local head loss and friction head loss in trickle lateral is closely related to emitter spacing. Taking Φ16 as an example,the local head loss is 0.23 ~ 1.89 times of that in friction head loss in trickle lateral. The local head loss of trickle laterals is little in laminar flow region and could be neglected in unprecise calcu⁃lation. This research provides a reference for the pipe network hydraulic calculation.关键词
内镶圆柱式滴头/毛管/局部水头损失/量纲分析/数值模拟Key words
in-line emitter/trickle lateral/local head loss/dimensional analysis/numerical simulation分类
农业科技引用本文复制引用
王亚林,朱德兰,张林..基于量纲分析的内镶圆柱式毛管局部水头损失研究[J].水利学报,2015,(5):602-611,10.基金项目
“十二五”国家科技支撑计划（2011BAD29B00）；教育部、国家外国专家局“111”计划项目（B12007）；西北农林科技大学基本科研业务费专项资金项目（2014YB061）；中国科学院西部之光人才培养计划项目 （）
