斜向进流城市排水泵站进水箱涵配水均匀性的改善研究

发布时间：2018-02-25 05:15

本文关键词： 泵站斜向进流进水箱涵配水均匀性数值模拟　出处：《灌溉排水学报》2017年12期 　论文类型：期刊论文

【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。
[Abstract]:In order to analyze the hydraulic flow characteristics of an oblique inflow urban drainage pumping station in Shanghai and improve the uniformity of water distribution of its inlet box culvert, based on the unsteady Reynolds time averaged N-S equation and the RNG k- 蔚 turbulence model, The CFD numerical simulation method is used to study the flow pattern of the inlet system and the uniformity of the water distribution of the inlet box culvert. In view of the shortcomings of the inlet water system of the pumping station, the rectifying measures are put forward, and the numerical simulation and physical model test are carried out. The results show that the oblique pipe culvert inflow easily results in the uneven distribution of the flow in each hole of the inlet box culvert of the pumping station, and the sluice gate well. In some box culvert holes and at the inlet of the forebay there are some bad flow patterns such as vortex, backflow, transverse flow, etc. By designing a new rectifying measure in the gate well, It can effectively improve the hydraulic flow state and the uniformity of water distribution in the inlet box culvert of the oblique inflow city pump station. The flow distribution coefficient of each hole in the box culvert is adjusted from 38.41% to 28.07% 22.48% 25.49% and 23.96% respectively from 38.41% to 42.52% and 13.96% to 28.07% and 23.96%, respectively, so as to ensure the good influent condition of the pumping station. The physical model test further verifies the validity of the rectifying measures and the reliability of the numerical calculation method. The above deficiencies can be effectively improved by setting the rectification measures proposed in this paper in the gate well.
【作者单位】：河海大学水利水电学院;
【基金】：江苏省自然科学基金青年基金项目(BK20150808) 中央高校基本科研业务费项目(2014B12314) 江苏高校优势学科建设工程资助项目
【分类号】：TU992.25

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