| 引用本文: | 王拯谦,王瑞海,李 旭,等.大偏角侧向进水泵站上下游流态协同建模与验证研究[J].灌溉排水学报,2025,44(11):27-37. |
| WANG Zhengqian,WANG Ruihai,LI Xu,et al.大偏角侧向进水泵站上下游流态协同建模与验证研究[J].灌溉排水学报,2025,44(11):27-37. |
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| 摘要: |
| 【目的】解决天津某大偏角侧向进水泵站复杂水力问题。【方法】采用数值模拟与物理模型耦合方法，开展上下游流态协同建模与验证研究。基于1∶50正态物理模型与CFD数值模型，系统分析了竖井贯流泵装置在不同水位工况下的流态特性。【结果】上游引水渠流态平顺但存在右岸偏流特征，进水池底部流速0.59~0.65 m/s且伴随弱逆时针回流；下游出水池流态对称稳定，箱涵末端流速达1.00~1.68 m/s，受河心岛影响形成显著流速梯度。水位波动分析揭示泵组启动后呈两阶段下降特性，最高水位时吸水口最大波谷降幅达89 cm。数值模拟与物理模型试验在整体流态、流速分布上具有良好一致性，但在前池回流模拟及水位响应时间上存在差异。【结论】系统揭示了大偏角侧向进水泵站上下游流态演变规律及水位波动响应特性，为类似复杂水力条件下泵站流态优化设计与运行参数提供参考依据。 |
| 关键词: 侧向进水；水力特性；数值模拟；物理模型试验 |
| DOI：10.13522/j.cnki.ggps.2025116 |
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| Numerical and experimental study of upstream and downstream flows in pumping stations with large-deflection-angle lateral intake |
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WANG Zhengqian, WANG Ruihai, LI Xu, CHEN Haifeng, FENG Shuyun, HE Huaijie
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1. Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China;
2. Tianjin Yongding River Management Center, Tianjin 300130, China
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| Abstract: |
| 【Background and Objective】Pumping stations with large-deflection-angle lateral intakes often exhibit complex hydraulic behaviors, such as uneven velocity distribution and local recirculation, affecting operational stability and efficiency. To address these challenges, we used numerical simulation and physical experiments to analyze the upstream and downstream flow patterns of the pumping station.【Method】The study was based on a pumping station in Tianjin. A 1∶50 physical model and a CFD numerical model were developed to simulate the shaft-tube pumping system. Flow field characteristics, velocity distribution, and water level variations were analyzed under different operating conditions.【Result】The upstream inlet pool exhibited overall smooth flow with a right-bank deflection and weak counterclockwise recirculation, where the bottom velocities ranged from 0.59 to 0.65 m/s. The downstream outlet pool maintained stable and symmetrical flow, with velocities at the box culvert outlet ranging from 1.0 to 1.68 m/s, forming a clear velocity gradient due to the mid-channel island. Water level monitoring revealed a two-stage decline following pump startup, with the maximum drawdown reaching 0.89 m at the suction inlet under the highest water level condition. Numerical and experimental results were generally consistent in reproducing the main flow features and velocity distributions, though minor discrepancies occurred in the forebay recirculation and water level response time.【Conclusion】Our findings demonstrate the effectiveness of the inlet and outlet design in improving the hydraulic performance of the pumping station, and that the physical and numerical models provide an effective method for analyzing and optimizing flow patterns in large-deflection-angle lateral intakes of pumping stations. |
| Key words: lateral inflow; hydraulic characteristics; numerical simulation; physical model test |
