| 引用本文: | 张 睿,徐 辉,陈毓陵,等.斜向进流城市排水泵站进水箱涵配水均匀性的改善研究[J].灌溉排水学报,2017,36(12):. |
| ZHANG Rui,XU Hui,CHEN Yuling,et al.斜向进流城市排水泵站进水箱涵配水均匀性的改善研究[J].灌溉排水学报,2017,36(12):. |
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| 摘要: |
| 为了分析上海某斜向进流城市排水泵站的水力流动特性，改善其进水箱涵的配水均匀性。基于非定常的雷诺时均N-S方程（URANS）和RNG k-ε湍流模型，采用CFD数值模拟方法研究泵站进水系统的水流流态和进水箱涵的配水均匀性，针对泵站进水系统存在的不足提出整流措施并对其进行数值模拟分析和物理模型试验验证。结果表明，斜向管涵进流容易造成泵站进水箱涵各孔内的流量分配不均，闸门井、部分箱涵孔内以及前池进口处存在旋涡、回流、横向流等不良流态；通过在闸门井内设计布置一种新型的整流措施，可以有效地改善斜向进流城市泵站进水箱涵内的水力流态和提高其配水的均匀性，其中箱涵各孔的流量分配系数由38.41%、5.11%、42.52%和13.96%分别调整为28.07%、22.48%、25.49%和23.96%，进而有利于保障泵站良好的进水条件；物理模型试验进一步验证了整流措施的有效性及数值计算方法的可靠性。斜向管涵进流形式城市排水泵站的进水箱涵容易产生配水不均、进水流态不良等问题；通过在闸门井内设置本文所提的整流措施，能够有效改善上述不足。 |
| 关键词: 泵站； 斜向进流； 进水箱涵； 配水均匀性； 数值模拟 |
| DOI：10.13522/j.cnki.ggps.2017.12.013 |
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| Improving the Uniformity of Water Distribution in the Box Culvert of Urban Drainage Pumping Station with a Slanted Intake |
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ZHANG Rui, XU Hui, CHEN Yuling, FENG Jiangang, WANG Xiaosheng, ZENG Yifu
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College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
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| Abstract: |
| In this paper, the flow and water distribution uniformity in the box culvert of an urban drainage pumping station with slanted intake in Shanghai was studied numerically based on the unsteady Reynolds averaged N-S equation and the RNG k-ε turbulence model. The results showed that the oblique inflow could easily cause an unequal water distribution in different box culvert channels of the urban drainage pumping station, and that there were some adverse flow patterns such as backflow, vortex flow, transverse flow, found in the gate shaft, some box culvert channels and the fore-bay of the pumping station. The flow pattern and water distribution uniformity in the box culvert could be improved by a thorough design and setting a new typical rectification measure in the gate shaft. And there would be good inflow condition in the pumping station. The results of this paper could provide some valuable references to design and operation of urban drainage pumping station with slanted intake. |
| Key words: pumping station; slanted intake; inflow box culvert; uniformity of water distribution; numerical simulation |
