三种渠道不同坡度下巴歇尔量水槽数值模拟  

Numerical Simulation of Parshall Flume with Different Slope in Three Types of Channels

作　　者：曾钰峰 何新林[1,2] 乔长录[1,2] 李小龙[1,2] 杨广 金瑾[1,2] ZENG Yu-feng;HE Xin-lin;QIAO Chang-lu;LI Xiao-long;YANG Guang;JIN Jin(College of Water Conservancy and Construction Engineering,Shihezi University,Shihezi 832000,Xinjiang,China;Key Laboratory of Modern Water Saving Irrigation of Xinjiang Production and Construction Corps,Shihezi 832000,Xinjiang,China)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832000 [2]新疆生产建设兵团现代节水灌溉重点实验室,新疆石河子832000

出　　处：《节水灌溉》2022年第7期22-28,共7页Water Saving Irrigation

基　　金：兵团科技攻关计划项目(2018AB027);国家自然科学基金项目(U1803244);国家自然科学基金项目(51969027)。

摘　　要：探究巴歇尔量水槽在U形渠道、梯形渠道、矩形渠道下的适用性及适用坡度。通过物理试验与数值模拟相结合的方法进行探究。物理试验在3种渠道上分别设置不同的坡度,在不同流量工况下进行试验。数值模拟采用Ansys软件进行数值模拟。分析不同方案下巴歇尔槽的水头损失、流速及压强分布、水面线、测流误差等的变化情况。进而得出巴歇尔量水槽适宜渠道及坡度。测流误差:U形渠道>矩形渠道>梯形渠道,0.3%>0.2%>0.1%。随着来流量的增加,其测流误差会逐渐减小。局部水头损失随着坡度增加而增大,U形渠道下巴歇尔槽局部水头损失最小,矩形渠道最大。从更高的测流精度考虑,梯形渠道更适合巴歇尔槽的运行,超过0.1%坡度后,随着坡度增大,巴歇尔槽测流误差逐渐增大。In order to explore suitability and applicable slope of Parshall flumes under U-shaped channel,trapezoidal channel and rectangular channel,different slopes were set up on the three channels by combining physical test and numerical simulation,and tests were carried out under different flow conditions.The Ansys software was used for numerical simulation.The variation of head loss,velocity and pressure distribution,water surface line and flow measurement error of Parshall flume under different scenarios was analyzed.Then the suitable channel and slope or Parshall flume were obtained.The results showed that the order of flow measurement error from large to small was U-shaped channel,rectangular channel,trapezoidal channel,as 0.3%,0.2%,0.1%,respectively.With the increase of incoming flow,the measurement error decreased gradually.The local head loss increased with the increase of slope,and the local head loss of Parshall flume in the U-shaped channel was the smallest,while that in the rectangular channel was the largest.It can be concluded that the trapezoidal channel is more suitable for Parshall flumes to work in terms of higher accuracy of flow measurement.When the slope exceeds 0.1%,the flow measurement error of Parshall flumes will increase gradually with the increase of the slope.

关 键 词：巴歇尔槽 坡度 数值模拟 水力特性 渠道断面形式 

分 类 号：S611[农业科学—园艺学]