Abstract
Free surface vortex control is vital in a pump sump system because the air absorbed by free surface vortex induces noise, vibration, and cavitation corrosion on the pumping system. In this study, the change of free surface vortex and air absorption in a pump intake has been investigated by the Volume of Fraction (VOF) method with steady multiphase flow model in order to represent the behavior of the free surface vortex exactly. The homogeneous free surface model is used to apply interactions of air and water. The results show that air intake by the free surface vortex motion can be visualized using the iso-surface of air volume fraction. The vortices make an air column from the free surface to the pump intake. Also, it was found that the free surface vortex can be controlled by installing curtain walls.
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Acknowledgments
This is the modified version of the paper presented in the 6th Asian Joint Workshop on Thermophysics and Fluid science.
This research was supported by “BK21 Plus project” and “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea. (No. 20164010200940)
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This research was supported by “BK21 Plus project” and “Human Resources Program in Energy Technology” (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea. (No. 20164010200940)
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Park, Y.K., Dey, M.K., Choi, Y.H. et al. Numerical visualization of air intake induced by free surface vortex. J. Therm. Sci. 26, 540–544 (2017). https://doi.org/10.1007/s11630-017-0971-2
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DOI: https://doi.org/10.1007/s11630-017-0971-2