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当前位置: 首页 > 文章 > 低压灌溉管道输浑水阻力损失试验与建模 农业机械学报 2013,44 (6) 148-155
Position: Home > Articles > Experiment and Modelling on Resistance Loss of Muddy Water Delivery for Irrigation in Low-pressure Pipeline System Transactions of the Chinese Society for Agricultural Machinery 2013,44 (6) 148-155

低压灌溉管道输浑水阻力损失试验与建模

作  者：
宗全利;汤骅;安杰
单  位：
石河子大学水利建筑工程学院
关键词：
低压管道;浑水;阻力损失系数;试验
摘  要：
通过低压管道输水阻力损失试验,分别研究了清水和浑水条件下的阻力损失变化规律。清水条件下,得到了清水阻力系数与清水雷诺数的定量关系式,可以用于后续清水阻力损失的计算;浑水条件下,重点分析了浑水阻力损失随流速和含沙量体积比的变化规律,其中浑水阻力损失随流速的增大而增大,在含沙量较小时,随含沙量体积比增大而增大,在含沙量较大时却随含沙量体积比增大而减小,并从泥沙的制紊和减阻角度分析了产生这种变化规律的原因。研究了浑水阻力损失系数变化规律,得到了阻力损失系数与无量纲综合因子之间定量关系式,试验结果与标准Durand和陈广文计算模型验证比较表明:两种模型计算结果与试验结果存在较大差异,不能用于计算管道浑水阻力损失。根据试验结果得到了浑水阻力损失与水流弗劳德数和含沙量体积比乘积以及泥沙沉降弗劳德数之间定量关系式,该关系式相关系数R=0.90,拟合度较高,可以用于实际工程浑水阻力损失计算。
译  名：
Experiment and Modelling on Resistance Loss of Muddy Water Delivery for Irrigation in Low-pressure Pipeline System
作  者：
Zong Quanli1,2 Tang Hua1 An Jie1 (1.College of Water Conservancy and Architectural Engineering,Shihezi University,Shihezi 832000,China 2.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)
关键词：
Low-pressure pipeline Muddy water Resistance loss coefficient Experiment
摘  要：
Through experimental study on resistance loss of water delivery in pipeline system,the variation laws of resistance loss for clean and muddy water were researched respectively.In clean water experiment,the quantitative formula between resistance loss coefficient of clean water and Reynolds number was achieved.It could be used to calculate resistance loss of clean water.In muddy water experiment,the variation law of resistance loss with the difference of velocity and sediment content was focused on,which the resistance loss increased with the increasing of velocity.On the condition of small sediment content the resistance loss increased with the increasing of sediment content,while it decreased with the increasing of sediment content on the condition of large sediment content.The reason for producing this variation law of resistance loss was analyzed from turbulence prevention and drag reduction by sediment.Based on this analysis,the variation law of resistance loss coefficient for muddy water was researched,and the calculation formula between the resistance loss coefficient and the dimensionless comprehensive factor was developed.Comparison between the experimental results and standard Durand and Chen Guangwen calculation model showed that there was large difference between them,and the existing models couldn't applied to calculate the resistance loss of muddy water.According to the results of experiment,the quantitative formula,between resistance loss and the product of the flow Froude number and sediment concentration,and the Froude number of sediment deposition was developed.Result showed that the correlation coefficient R was 0.90.

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