Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Control of Subsurface Vortex on Cylindrical Sump Wall

원통형 펌프 흡입정 벽면에서 발생하는 수중 보텍스 제어

  • Park, Young Kyu (Research Institute of Industrial Science & Technology, Pukyong National University) ;
  • Jeon, Joon Ho (Department of Mechanical Design Engineering, Pukyong National University) ;
  • Lee, Yoen Won (Department of Mechanical Design Engineering, Pukyong National University)
  • Received : 2019.07.30
  • Accepted : 2019.08.23
  • Published : 2019.08.31
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Abstract

The subsurface vortex - which occurs inside the cylindrical sump - was visualized through Computational Fluid Dynamics (CFD) and experiment. The analysis of subsurface vortex inside the cylindrical sump was already carried out using CFD techniques by the first author. To understand the subsurface vortex more clearly, an experimental analysis was carried out with a 1/5th scale model; and the flow rate was calculated according to the similarity law. The experimental results of vortex visualization matches well with the CFD results. The surface roughness model and Anti Vortex Device (AVD) model have been investigated to control the subsurface vortex. For the case of average surface roughness of 1mm and 5mm, the subsurface vortex appears and the vorticity is higher when compared to that of a smooth surface condition. However, for the AVD model, the subsurface vortex is completely removed and the internal flow is stabilized.

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