| Cite this article: | 许虎,吴文勇,王振华,等.基于CFD的巴歇尔槽进口连接段结构优化与水动力学特性分析[J].灌溉排水学报,0,():-. |
| Xu-Hu,Wu-Wenyong,Wang Zhen-hua,et al.基于CFD的巴歇尔槽进口连接段结构优化与水动力学特性分析[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Structure optimization and hydrodynamics analysis of inlet connection section of Parshall flume based on CFD |
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Xu-Hu1, Wu-Wenyong1,2, Wang Zhen-hua1, Wang Qiu-liang3
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1.College of Water Conservancy and Architectural Engineering,Shihezi University,Shihezi Xinjiang;2.The China Institute of Water Resources and Hydropower Research,BeiJing;3.Shenzhen Water Planning Design Institute Co,Ltd Guangdongshenzhen
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| Abstract: |
| 【Objective】To explore the optimal form of the upstream inlet connection section of the Parshall flume, the variations of head loss、surface line、 measurement error、 velocity and pressure cloud of different inlet connections are analyzed in the case of free outflow, Obtained the form of connection segment with the highest water delivery efficiency. 【Method】Used SolidWorks software to build physical models of different inlet connection section, ANSYS18.0 software meshing and numerical simulated, Tecplot and Origin software for data analyzed. 【Result】 Result 1: the filament line of the Parshall flume with inlet connection is smoother than that without connection； Result 2: the local head loss of Parshall flume is the highest in the transition without connection section and the lowest in the inner circular transition section； Result 3: the relative error of flow measurement precision in Parshall flume decreases with the increase of incoming flow；the highest flow measurement precision in rectilinear transition section; Result 4: the change gradient of velocity and pressure cloud in the longitudinal profile of Parshall flume is obvious, The highest velocity is in the throat section、 and the maximum hydrostatic pressure in the upstream hydrosphere. 【Conclusion】Flow measurement should be completed when the incoming flow is large、the inlet connection section is lined to prevent the measurement error caused by the deformation of Parshall flume caused by hydrostatic pressure. |
| Key words: Parshall flume; inlet connection section; numerical simulation; flow measurement precision |
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