弧角梯形渠道无喉道量水槽水力特性研究  

Hydraulic Characteristics of Arc Angle Trapezoidal Canal without Throated Measuring Flume

作　　者：景志芳 马孝义[1] 杨珮珮 JING Zhi-fang MA Xiao-yi YANG Pei-pei(Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest A＆F University, Yangling 712100, Shaanxi Province, China)

机构地区：[1]西北农林科技大学旱区农业水土工程教育部重点实验室,陕西杨凌712100

出　　处：《节水灌溉》2017年第7期107-111,共5页Water Saving Irrigation

基　　金：国家自然科学基金项目(51279167);"十二五"国家科技支撑计划项目(2012BAD08B01);水利部公益性行业专项项目(201301016);公益性行业(农业)科研专项项目(201503124);高等学校博士学科点专项科研基金项目(20120204110023)

摘　　要：量水设施作为灌区灌溉管理工作的基础性设施,其水力特性的研究是灌区量水的基础工作。基于FLUENT 6.3软件,采用VOF方法和RNG k-ε湍流模型对弧角梯形渠道无喉道量水槽过槽水流进行三维数值模拟,对不同工况下的流速分布、水面线、水头损失等水力特性进行研究并建立相关的流量计算公式,与渠道流量进行对比分析。结果表明,当收缩比为0.57~0.74时,该数值方法能够在4.985 3~33.597 6 m3/s较大流量范围内测流,准确度较高,可为灌区渠系编制用水计划和调整供配水方案提供依据。Abstract： As the basic facility of the irrigation management, the research on the hydraulic characteristics of water-measuring devices is the basic work for water measuring in irrigation area. By using FLUENT 6.3 software with VOF method and RNG k-e turbulence model, 3D numerical simulation of the arc angle trapezoidal canal without throated measuring flume is conducted to study the velocity distribution, water line, head loss and other hydraulic characteristics under different conditions. Besides, the relevant flow calculation formula is established and the comparative analysis is made with measured canal discharge. The results show that the formula obtained from numerical method can get accurate flow measurement in the range of 4.985 3-33.597 6 m^3/s when the contraction ratio is 0.57 ~0.74, and can provide base for the decision of irrigation water use plan and the adjustment of water supply and distribution scheme of irrigation canal system.

关 键 词：弧角梯形渠道无喉道量水槽 量水设施 水力特性 

分 类 号：S27[农业科学—农业水土工程] TV135.3[农业科学—农业工程]