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| DOI：10.13522/j.cnki.ggps.20180283 |
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| A Modified Method to Improve Flow Pattern in Water Distributing Station |
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WANG Xiaosheng, CHEN Yuling, SUN Jingkang
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College of Agricultural Engineering, Hohai University, Nanjing 210098, China
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| Abstract: |
| Water distribution station is a multipurpose hydraulic hub consisting of diversion sluices and pumping station. The distributing pool in the hub is a crucial facility, a deterioration of flow pattern in which could affect the efficiency and safe operation of the station and the sluice. 【Objective】 This paper studied the flow characteristics in the distributive pool as well as its consequent effect on the pumping station and the sluice.【Method】 We used physical models to study the flow pattern in the water distributing station, and analyzed the reasons when inferior flow pattern occurred as well as its consequent impact on the inflow to the sluices and the pumps. A modified method was proposed to improve flow patter in the distributing pool.【Result】 The flow pattern in the distributing pool had a significant influence on inflow to the pump station and the sluices. Undesirable flow was related to the local body shape and the flow condition in its diffusion section. Biased current and the local circumfluence can be eliminated by setting V-shape sills, which can significantly improve the flow conditions in the pumping station and the sluice. The sills can improve the flow uniformity in the inlet of the pumping station by 40% under a full load operation after hydraulic optimization. 【Conclusion】 The V-shape sills can significantly enhance the lateral diffusion of water flow and eliminate the flow separation in the diffusion section, thereby effectively improving the drift and local back-flowin the distributing pool. |
| Key words: distributive sluice station; distributive pool; forebay; to improve flow pattern; model test |
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