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http://dx.doi.org/10.5293/KFMA.2007.10.4.039

CFD Prediction on Vortex in Sump Intake at Pump Station  

Park, Sang-Eun (시립인천전문대학 기계과)
Roh, Hyung-Woon ((주)아이베이 GD3)
Publication Information
The KSFM Journal of Fluid Machinery / v.10, no.4, 2007 , pp. 39-46 More about this Journal
Abstract
In large pump station, vortex generation such as free-surface vortex and submerged vortex occurring around pump intake, or at bell-mouth inlet has been an important flow characteristics which should be considered always to keep away the suction of air-entrained or cavitated flow. In this study, a commercial CFD code was used to predict accurately the vortex generation for the specified intake design. These result shows the preliminary result of submerged vortex prediction for the Turbo-machinery Society of Japan Sump Test CFD standard model. At bottom wall, air volume fraction (red color) was found in a large scale to explain the submerged vortex generation at particular operation and configuration condition. And these indicate the free surface formation behind the bell mouth. Particularly, non-uniform approaching flow is a major parameter to govern the occurrence of the free-surface vortex. Futhermore the comparison between turbulence ($k-{\epsilon}$ & $k-{\omega}$ model) mode were executed in this study.
Keywords
Sump Station; Vortex; Cavitation; CFD prediction;
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