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| DOI：10.13522/j.cnki.ggps.2020042 |
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| Study on the Influence of Pump Installation Location on the Hydraulic Performance of Integrated Pumping Station by CFD |
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YAN Hongqin1, JIANG Hongying1, CHENG Li2*, LI Shanghong3, WANG Mo4, CHEN Wei2
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1. Hydraulic Engineering Science and Technology Consultation Limited Company of Jiangsu Province, Nanjing 210029, China; 2. College of Hydraulic Science and Engineering,Yangzhou University, Yangzhou 225009, China; 3. Jiangsu Jiangdu Water Conservancy Project Management Office, Yangzhou 225220, China; 4. Anhui Branch of Hainan Provincial Water Resources and Hydropower Survey and Design Institute, Hefei 230000, China
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| Abstract: |
| 【Background】With the rapid development of urbanization, however, a large amount of urban water is also generated, and urbanization construction is seriously affected, which requires timely delivery by pumping stations. At present, most concrete pump stations are used, but they have the disadvantages of large floor area, long construction period, large investment, labor and material resources, etc. At the same time, it is difficult to move the concrete pump station after it was completed. Integrated pumping station is a relatively new type of pumping station, which is relatively simple to manufacture, install and maintain, with the implementation of the national sponge city strategy, the integrated pump station has been promoted at home and abroad and can be widely used. In addition, the construction of integrated pumping stations can solve certain local land shortages and environmental pollution problems. So far, many domestic scholars have researched integrated pumping stations. Previous studies on integrated pumping stations mainly focused on specific applications in engineering, and there was less research on the impact of submersible axial flow pumps and their installation locations.【Objective】In order to explore the influence of different pump installation positions on the internal flow characteristics and hydraulic performance of the integrated pumping station, 【Method】we take two submersible axial flow pumps arranged symmetrically as the research object, under a certain flow condition, and the physical model was established by UG software, and the pump body was meshed with ICEM CFD software. The horn inlet, outlet pipe, and collecting tank were meshed with Mesh software. The influence of key position parameters such as the distance between pump installation centers and the distance between two pumps on the flow characteristics of the integrated pumping station was analyzed based on CFD. 【Result】The results showed that the hydraulic efficiency of pump I and pump II was different due to the asymmetry of water flow in the sump and the influence of pump water absorption. The hydraulic efficiency of pump I was about 4% higher than that of pump II, and the uniformity of flow velocity at the inlet of pump I was 1%~4% higher than that of pump II. The change of the center distance of two pumps in the integrated pumping station had little effect on the hydraulic efficiency of the pump, but had great influence on the uniformity of water absorption of the pump. The change of the distance between the two pumps in the integrated pumping station had a great influence on the hydraulic efficiency of the pump, but when the distance reached a certain value, it had little influence on the suction uniformity of the pump, but the flow pattern in the sump becomes worse. 【Conclusion】In the context of this integrated pumping station, it is suggested that the recommended center distance L of the integrated pumping station with two pumps is 0.4 R, and the recommended distance S of the pump is 0.6 R. |
| Key words: integrated pumping station; installation position; numerical simulation; hydraulic performance |
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