| 摘要: |
| 【目的】 研究数值模拟技术对矩形薄壁量水堰自由水面和泄流量的模拟能力。【方法】 应用基于CFD的流体分析软件FLUENT，采用带自由表面的k-ε气液两相紊流数学模型，并使用自定义UDF函数处理入口条件，对整个流场进行数值模拟计算，得到了整个流场的流态分布图、泄流量、自由水面和压力分布等水力参数。【结果】 将模拟得到的自由水面和泄流量与实测值进行对比，二者吻合良好，说明所选数值模型能够准确模拟矩形薄壁量水堰的流场特性。【结论】 本研究采用的数值模拟技术,能成功模拟矩形薄壁量水堰的自由水面和泄流能力，可以为量水堰的水力设计提供参考依据。 |
| 关键词: 矩形薄壁堰 泄流能力 数值模拟 自由水面 |
| DOI： |
| 分类号: |
| 基金项目:陕西省教育厅科学研究计划项目（08JK404） |
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| Numerical simulation about Rectangle Sharp-crested Weir and evaluation of free-surface |
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XU Ling-jun,CHEN Gang,LI Guo-dong,XUE Yang
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| Abstract: |
| 【Objective】 The research studied the accuracy of numerical simulation about the free surface and flow discharge of Rectangle Sharp-crested Weir.【Method】 FLUENT software based on CFD to progress numerical simulation is used.The k-ε turbulent model with free surface is used to solve the free surface,and UDF function is adopted on inlet.The whole flow field is simulated.The hydraulic parameters of the whole flow field such as flow pattern,flow dischardge,free surface and pressure distribution are obtained.【Result】 The free surface and flow dischardge are compared with measurement and they are in good agreement with each other. The selected model can simulate the flow characteristics of measuring weir accurately.【Conclusion】 The comparison of measurement and simulation results gives the conclusion:The numerical simulation about discharge capacity and free-surface in this paper is successful，and it can provide reference for hydraulic design of the measuring weir. |
| Key words: Rectangle Sharp-crested Weir discharge capacity numerical simulation free-surface |
