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

许虎; 吴文勇; 王振华; 王秋良

引用本文:	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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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
许虎¹, 吴文勇^2,1, 王振华¹, 王秋良³
1.石河子大学水利建筑工程学院;2.中国水利水电科学研究院;3.深圳市水务规划设计院

摘要:

【目的】为探究巴歇尔槽上游进口连接段最优形式,在自由出流情况下,分析不同进口连接段形式对水头损失、水面线、测流误差、流速及压强的变化情况,得出输水效率最高的连接段形式。【方法】采用SolidWorks建模软件对不同进口连接段形式建立物理模型,利用ANSYS18.0软件对模型进行网格划分与数值模拟计算,运用Tecplot、Origin软件进行数据分析。【结果】结果1：采取进口连接段过渡的巴歇尔槽相比无连接段过渡的水流流线更平缓；结果2：无连接段过渡的巴歇尔槽局部水头损失最大、内接圆弧过渡段形式巴歇尔槽局部水头损失最小；结果3：巴歇尔槽测流精度相对误差随着来流流量的增大而减小、直面过渡段形式巴歇尔槽测流精度最高；结果4：巴歇尔槽纵剖面速度、压强云图变化梯度明显,流速最大处位于喉道段、静水压强最大处位于上游雍水段。【结论】测流工作应该在来流流量较大时完成、进口连接段加以衬砌,防止因静水压强导致巴歇尔槽形变而产生测流误差。

关键词: 巴歇尔槽;进口连接段;数值模拟;测流精度

DOI：

分类号:TV131.4

基金项目:“十三五”国家重点研发计划项目(2016YFC0400102,2017YFC0403205);国家自然科学基金（51769030）

Structure optimization and hydrodynamics analysis of inlet connection section of Parshall flume based on CFD

Xu-Hu¹, Wu-Wenyong^1,2, Wang Zhen-hua¹, Wang Qiu-liang³

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

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