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냉각수순환시스템 흡입구 주변의 보텍스 생성에 관한 연구
표영석(Youngseok Pyo),박영규(Youngkyu Park),이연원(Yeonwon Lee) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
There have been many studies on sump models but existing studies of pump sump models mainly validate fluid flow and vortex around a pump intake using a single-phase method. In this study, multi-phase method is used for observation of free surface vortex and cavitations occurring by air inhalation and water pressure drop. The purpose of this study is to compare the multi- phase model and the single-phase model to evaluate the difference of the multi-phase and the single-phase model. Also steady and unsteady simulations are conducted to verification the difference of results according to the analysis conditions. A pump sump of test model is calculated using CFD and the following points are analyzed. 1)The location and the behavior of the free-surface vortex and submerged vortex 2)The Velocity distribution at the pump intake, 3)The free-surface vortex in the multi- phase and single-phase method.