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| 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 |
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