| 一种沿程均匀入流矩形渠道水面曲线计算方法 |
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| 引用本文： | 赵梓轩,王建龙,王文海,夏艳辉,杨峰.一种沿程均匀入流矩形渠道水面曲线计算方法[J].环境工程,2023,41(3):21-25. |
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| 作者姓名： | 赵梓轩 王建龙 王文海 夏艳辉 杨峰 |
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| 作者单位： | 1. 北京建筑大学 城市雨水系统与水环境教育部重点实验室, 北京 102616; |
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| 基金项目： | "十四五"国家重点研发计划课题"城市更新场景下的内涝系统治理技术研究"(2021YFC3001402) |
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| 摘 要： | 近年来线性排水沟、道路边沟等有沿程入流的排水渠道得到越来越广泛的应用，但尚缺乏关于其水力特性的计算方法。根据圣维南方程，推导出有沿程均匀入流的明渠非均匀流水面曲线微分方程，并采用有限差分法得出特定条件下的水面曲线数值解。通过将数值解与实验水面曲线进行对比发现，两者曲线吻合性较好，进一步拟合提出了有沿程入流渠道的过流能力计算公式，以期为类似排水沟渠的设计计算提供参考。
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| 关 键 词： | 水面曲线 沿程均匀入流 明渠非均匀流 圣维南方程组 |
| 收稿时间： | 2022-01-02 |
A CALCULATION METHOD FOR WATER SURFACE CURVE OF RECTANGULAR CHANNEL WITH UNIFORM INFLOW |
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| Institution: | 1. Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 102616, China;2. Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center, Beijing University of Civil Engineering and Architecture, Beijing 102616, China |
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| Abstract: | Urban drainage facilities such as linear drainage ditches and roadside ditches are all drainage channels with inflow along the route, but there is still a lack of calculation methods on their hydraulic characteristics. Based on the Saint-Venant equations, a new equation of the non-uniform flow in the open channel with uniform inflow along the pathway was proposed. We used the finite-difference method to calculate the water surface curve under experimental conditions, and compared it with the curve obtained from the experiment. The result showed that the water surface curves obtained from numeral calculation and experimental data were in good agreement, and a calculation formula of the flow capacity of the channel along the route was proposed by experimental data fitting, which could provide support for the design of the uniform inflow drainage channel along the route. |
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