| 引用本文: | 王晓升,陈毓陵,孙靖康.分水闸站枢纽分水池流态改善措施研究[J].灌溉排水学报,2018,37(12):107-113. |
| WANG Xiaosheng,CHEN Yuling,SUN Jingkang.分水闸站枢纽分水池流态改善措施研究[J].灌溉排水学报,2018,37(12):107-113. |
|
| 摘要: |
| 分水闸站枢纽是集分水闸与泵站为一体的枢纽工程，分水池是分水闸站枢纽的核心进水建筑物，其流态的优劣直接关系到泵站与水闸的安全、高效运行。【目的】深入研究分水池的流动特性及其对泵站、水闸进流条件的影响。【方法】基于物理模型试验，对分水闸站枢纽进水流态进行了研究，分析了分水池产生不良流态的原因，提出了改善分水池流态的整流措施。【结果】分水池流态对泵站及水闸进流条件影响显著，当分水池存在偏流和大范围回流区时，水闸进流存在偏流现象，泵站进水口配水流量不均；分水池发生偏流及壁面脱流的主要原因与分水池扩散段局部体型及来流条件相关；分水池扩散段增设V型底坎后，分水池流态得到显著改善，满负荷运行工况下的泵站前池进水口配水流量均匀度提升了近40%。【结论】V型底坎可以显著增强分水池水流的侧向扩散能力，消除扩散段的壁面脱流，有效改善分水池中的偏流与局部回流。 |
| 关键词: 分水闸站； 分水池； 前池； 流态改善； 模型试验 |
| DOI：10.13522/j.cnki.ggps.20180283 |
| 分类号: |
| 基金项目: |
|
| A Modified Method to Improve Flow Pattern in Water Distributing Station |
|
WANG Xiaosheng, CHEN Yuling, SUN Jingkang
|
|
College of Agricultural Engineering, Hohai University, Nanjing 210098, China
|
| 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 |
