摘要
以推广灌区测控一体化闸门量水技术为背景,设计并研发了适用于U形渠道的测控一体槽闸模型,以推动量水设施的标准化研究。针对标准D40 U形渠道,在不同流量Q和开度e条件下开展测控一体槽闸过闸水力特性的试验与模拟,分析其水力性能的影响因素及其过流能力。结果表明:模拟值与实测值之间具有较高的吻合度,其中流量的决定系数R^(2)为0.957、均方根误差RMSE为0.334,水深的R^(2)为0.952、RMSE为0.378;闸前水流稳定,上游水深随着Q的增大而上升,随着e的增大而下降,下游水面变化趋势与上游相反,各开度下的上游佛汝德数Fr均小于0.5;在流量Q较大及开度e较小情况下,闸前流速分布更为均匀,且闸前、后流速存在显著差异;计算与实测过闸流量的最大相对误差为4.10%,平均相对误差为3.41%,符合灌区量水误差不超过5%的标准要求。研究测控一体槽闸设备能提高灌区测量的精准度,并为灌区量水设备的技术研究提供有价值的参考。
To promote water measurement technology in irrigation areas,a measurement and control integrated sluice gate model suitable for U-shaped channels was designed and developed for the standardization of water measurement facilities.Experiments and simulations were carried out on the measurement and control integrated sluice gate under different flow rates(Q)and openings(e)in the standard D40 U-shaped channel to analyze the influencing factors of the hydraulic performance and discharge capacity of the gate.The results show that the simulated values are highly consistent with the measured ones,with a determination coefficient(R 2)of 0.957 and a root mean square error(RMSE)of 0.334 for the flow rate,and a R^(2) of 0.952 and a RMSE of 0.378 for the water depth.The water in front of the sluice gate is stable,and the upstream water depth increases with the increase of Q and decreases with the increase of e;whereas the downstream water surface profile follows an opposite pattern,and the upstream Froude number(Fr)corresponding to each opening is less than 0.5.When the Q is high and e is small,the flow velocity distribution in front of the sluice gate is more uniform,and there is a significant difference in the flow velocity values in front of and behind the sluice gate.The maximum relative error between the simulated and measured flow through sluice gates is 4.10%,and the average relative error is 3.41%,which fits the requirement of less than 5%for water measurement error in the irrigation area.The research on measurement and control integrated sluice gate facilities can improve the measurement accuracy and provide a reference for the development of water measurement technology in irrigation areas.
作者
张文敏
王文娥
曹启
杜怡影
刘渡坤
胡明宇
ZHANG Wenmin;WANG Wene;CAO Qi;DU Yiying;LIU Dukun;HU Mingyu(Henan Water Environment Survey and Design Co.,Ltd.,Sanmenxia 472000,China;Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education,Northwest A&F University,Yangling 712100,China)
出处
《水资源与水工程学报》
北大核心
2025年第3期199-207,共9页
Journal of Water Resources and Water Engineering
基金
陕西省重点研发计划项目(2024NC-ZDCYL-02-08)
国家自然科学基金项目(U2243235)
新疆维吾尔自治区重大科技专项(2023A02002)。
关键词
U形渠道
测控一体
槽闸
佛汝德数
流速分布
数值模拟
U-shaped channel
integrated measurement and control
sluice gate
Froude number
flow velocity distribution
numerical simulation
