| Cite this article: | 王盼,施建业,张闻,等.王盼,施建业,张闻,唐斌斌[J].灌溉排水学报,0,():-. |
| Wang Pan,Shi Jianye,Zhang Wen,et al.王盼,施建业,张闻,唐斌斌[J].灌溉排水学报,0,():-. |
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| Study on flow characteristics and self-cleaning optimization of prefabricated pumping station based on two phase flow theory |
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Wang Pan, Shi Jianye, Zhang Wen, Tang Binbin
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Jiangsu Yangzhou Survey,Design and Research.,Yangzhou
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| Abstract: |
| In view of the problem that the bottom of the prefabricated pump station is prone to siltation, based on the multiphase flow calculation theory, the flow characteristics of the prefabricated pump station are simulated by using the software CFX. The influence of the geometry structure form at the bottom of the prefabricated pump station on the operation performance and sediment deposition of the prefabricated pump station is studied. Different optimization schemes are designed to realize the self cleaning of the prefabricated pump station. According to the characteristics of flow field structure at the bottom of prefabricated pumping station, four bottom structures are designed, including flat bottom, platform bottom, conical bottom and elliptical bottom. The results show that the maximum efficiency of the first to fourth schemes is 76.8%, 79.2%, 80.6%, and 78.1%. The operation efficiency of the prefabricated pump station with the desktop bottom structure is the highest, the hydraulic loss is the smallest, and the range of the high efficiency area is the largest. There is obvious sediment deposition in the prefabricated pumping station with flat bottom and oval bottom, but there is no obvious sediment deposition in the prefabricated pumping station with cone bottom and bench bottom. The third plan is the middle and bottom structure prefabricated pump station with the least sediment deposition and the highest comprehensive performance. It shows that only the proper inlet geometry structure can ensure that the water can enter the pump inlet smoothly and reduce the siltation. While ensuring the high efficiency of the pump operation, it can reduce the silt deposition and realize the self-cleaning of the prefabricated pump station. The research results provide some reference for the design of prefabricated pumping station in the project. |
| Key words: Prefabricated pumping station; bottom form; sedimentation; flow field characteristics; CFD |
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