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ISSN Печать: 2152-5102
ISSN Онлайн: 2152-5110
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EFFECT OF SUBMERGENCE AND FLOW RATE ON FREE SURFACE VORTICES IN A PUMP SUMP
Краткое описание
Free surface vortices formed around an intake pipe in a pump sump can have a significant effect on the pump performance. The objective of this study is to investigate the effect of the submergence and flow rate on free surface vortices using numerical simulations. A finite volume method with a Reynolds-averaged Navier-Stokes turbulence model and a volume of fluid multiphase model was applied to solve the free surface flow in the sump with a single intake channel. A multiblocked structured grid system is used to capture the behavior and interaction of flow between two fluid phases with higher accuracy. The minimum elevation of air-water interface, air-entrained vortex length, and the volume rendering method are used to identify the location and shape of the free surface as well as free surface vortices. By investigating the air-water interface with a variation in submergence and flow rate, it was found that lower submergences or larger flow rates induce stronger free surface vortices to appear. The locations of the center core of surface vortices were predicted by the interface tracking method, and they were in good agreement with those of the experiments.
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Zhang Wenpeng, Tang Fangping, Shi Lijian, Hu Qiujin, Zhou Ying, Effects of an Inlet Vortex on the Performance of an Axial-Flow Pump, Energies, 13, 11, 2020. Crossref
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Xi Wang, Lu Weigang, Wang Chuan, Fu Guocong, Numerical and Experimental Study on the Opening Angle of the Double-Stage Flap Valves in Pumping Stations, Frontiers in Energy Research, 10, 2022. Crossref
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Yamini Omid Aminoroayaie, Movahedi Azin, Mousavi S. Hooman, Kavianpour Mohammad Reza, Kyriakopoulos Grigorios L., Hydraulic Performance of Seawater Intake System Using CFD Modeling, Journal of Marine Science and Engineering, 10, 7, 2022. Crossref