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Numerical modelling of contracted sharp-crested weirs and combined weir and gate systems

机译：合同尖峰堰的数值建模与堰组合堰和门系统

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摘要

Discharge measurement and control structures are widely employed in hydraulic engineering applications. The objective of this study is to numerically investigate the modelling of two different structures, namely sharp-crested weirs as Problem 1 and combined weir and gate systems as Problem 2. The research methodology herein is based on the comparison of results of numerical simulations with experimental data for both problems separately. For the purpose of performing numerical simulations, the Reynolds-averaged Navier-Stokes (RANS) equations are solved by finite volume formulation using commercially available Flow-3D software. Assessment of empirical data and numerical findings for both problems reveals that discharge rates agree reasonably well. In addition, using the capabilities of numerical modelling, weir and gate discharge coefficients in the combined system are calculated separately which were not easy to obtain in experimental studies. It is seen that gate and weir discharge coefficients of the combined system are different and higher than the corresponding coefficients of the individual systems. (c) 2020 John Wiley & Sons, Ltd.
机译：液压工程应用广泛采用放电测量和控制结构。本研究的目的是在数值上调查两种不同结构的建模，即尖锐的脊髓，即问题1，以及组合堰和栅极系统作为问题2。本文的研究方法基于实验性数据模拟结果的比较对这两个问题的数据分别。为了执行数值模拟，使用市售的流动3D软件通过有限的体积配方来解决雷诺平均的Navier-Stokes（RANS）方程。对两种问题的经验数据和数值调查的评估表明，放弃率相应得很好。另外，使用数值建模的能力，单独计算组合系统中的堰和栅极放电系数，其在实验研究中不容易获得。可以看出，组合系统的栅极和堰放电系数不同且高于各个系统的相应系数。 （c）2020 John Wiley＆Sons，Ltd。

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