| Cite this article: | 王海阳,王秀梅.利用反坡条件的泵站前池扩散角优化研究[J].灌溉排水学报,,():-. |
| WANG Hai-yang,WANG Xiu-mei.利用反坡条件的泵站前池扩散角优化研究[J].灌溉排水学报,,():-. |
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| Research on the diffusion angle of the pumping station forebay with counter-slope |
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WANG Hai-yang1, WANG Xiu-mei2
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1.China Water Resources Beifang Investigation, Design and Research Co., Ltd.;2.Tianjin Yongquan water Co. Ltd.
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| Abstract: |
| The diffusion angle of forebay of most positive inflow pumping stations is controlled according to 40 °, but some projects cannot meet the design code due to the site conditions, it makes the Flow Patterns in the forebay disordered and affects affect the operation of water pump. Adding the diversion pier、bottom sill、water pressure plate and slope are used to improve the flow pattern of the forebay with large diffusion angle. In this paper, a pumping station with counter-slope of the South-to-North Water Transfers was studied numerically based on the unsteady Reynolds averaged N-S equation and the Standard k-εturbulence mode1．Based on the initial design of the project, the flow pattern was calculated by adjusting the diffusion angle. The results showed when the diffusion angle is greater than 80 °, the flow in the forebay could not be effectively diffused, the backflow on both sides was obvious, and the suction condition of side hole water pump was poor, even the water depth is large in the forebay, and when the diffusion angle is 50 °, the flow pattern in forebay was stable and the flow diffusion was uniform. The results were applied in the project, and it is found in the operation of the project that the flow pattern of forebay is stable. It can be seen that the diffusion angle can be optimized in the pumping station with counter-slope. The results of this paper could provide some valuable references to design and operation of the pumping station with small construction site. |
| Key words: pumping station forebay ; mathematical modeling; flow pattern; counter-slope ;diffusion angle |
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