矩形渠道矩形侧堰水力特性试验研究  

Experiment on Hydraulic Characteristics of the Rectangular Side Weir in Rectangular Channel

作　　者：卢德友 王莹莹 张文正[2,3] 贾晓萌 LU De-you;WANG Ying-ying;ZHANG Wen-zheng;JIA Xiao-meng(Henan Vocational College of Water Conservancy and Environment,Zhengzhou 450011,China;Institute of Farmland Irrigation,CAAS,Xinxiang 453002,Henan Province,China;Key Laboratory of Water-saving Engineering,Ministry of)

机构地区：[1]河南水利与环境职业学院,郑州450011 [2]中国农业科学院农田灌溉研究所,河南新乡453002 [3]农业农村部节水灌溉工程重点实验室,河南新乡453002

出　　处：《节水灌溉》2023年第9期120-124,共5页Water Saving Irrigation

基　　金：中国高等教育学会2022年度高等教育科学研究规划课题(22SZH0309);中央级科研院所基本科研业务费专项(FIRI2022-11)。

摘　　要：矩形侧堰作为一种量水设施,具有结构简单、造价低廉、安装拆卸方便和精度较高等优点,适用于量大面广的小型渠道及田间进水口的量水。对矩形渠道上6种不同高度的矩形侧堰在6种不同流量下进行试验,获得了矩形渠道矩形侧堰上下游附近水面线,研究了壅水高度、水头损失等水力特性,推导了形式简单、精度较高的流量公式。结果表明,主渠道侧堰附近水面靠近侧堰一侧波动程度较大,主渠道中心线次之,远离侧堰一侧的较稳定;壅水高度和水头损失随堰高度的增加而增加;推导的流量公式最大相对误差绝对值为4.98%,平均相对误差绝对值为4.27%,满足相关标准及灌区量水精度要求。The rectangular side weir,as a kind of water-measuring device,is simple in shape,cost inexpensive,installed and removed easily while with high precision.It can be used for water measuring of the small channel and field inlet.Experiments are taken on different heights of rectangular side weirs under different discharges in rectangular channel.Water profiles near rectangular side weirs were obtained.Backwater height and head loss were analyzed.We obtained the discharge formulae with a simple form yet with high accuracy.The results show that water-surface waves on the wall near the side weir,the centerline,and the wall in the main channel differ.The backwater height and head loss increase with the increase of weir height.The absolute value of maximum relative error and the mean relative error are respectively 4.98%and 4.27%,meeting relevant standards and the accuracy of flow measurement in the irrigation district.

关 键 词：矩形侧堰 壅水高度 水头损失 水力特性 流量公式 侧堰高度 

分 类 号：S274.4[农业科学—农业水土工程] TV132.23[农业科学—农业工程]