Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Visualization of Air Absorption Induced by Free Surface Vortex in the Pump Sump Using Multi-phase Flow Simulation

펌프 섬프장내 자유표면 보텍스에 의한 공기흡입 현상의 가시화

  • 박영규 (부경대학교 대학원 메카트로닉스공학과) ;
  • 이규명 (부경대학교 대학원 메카트로닉스공학과) ;
  • 최윤환 (부경대학교 기계자동차공학과) ;
  • 이연원 (부경대학교 기계자동차공학과)
  • Received : 2011.09.16
  • Accepted : 2011.09.27
  • Published : 2011.09.30
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Abstract

In this study the change of free surface vortex is expressed through the time volume fraction using multiphase unsteady condition in sump, because in previous studies of the pump sump did not represent the behavior of the free surface vortex exactly due to the reason it was calculated using single phase and steady condition. The reliability of the computational analysis is verified through comparing experimental results with that of present numerical analysis. Homogeneous free surface model is used to apply interactions of air and water. The results show that the free surface vortex can be identified on the isotropic surface at air volume fraction 1%~5%. The vortices make an air column from the free surface to the sump intake and are created and destroyed repeatedly. The behavior of free surface vortex at numerical analysis is quite similar to experimental test. The result of vortex motion according to time, works on a cycle.

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References

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