Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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NUMERICAL ANALYSIS OF VENTILATED CAVITATION WITH FREE SURFACE EFFECTS

자유표면 영향을 고려한 환기공동 전산유동해석

  • Jin, M.S. (Dept. of Mechanical Engineering, Pusan National Univ.) ;
  • Kim, H.Y. (Dept. of Mechanical Engineering, Pusan National Univ.) ;
  • Ha, C.T. (Dept. of Mechanical Engineering, Pusan National Univ.) ;
  • Park, W.G. (Dept. of Mechanical Engineering, Pusan National Univ.)
  • Received : 2012.04.25
  • Accepted : 2013.02.28
  • Published : 2013.03.31
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Abstract

Cavitating flow is usually formed on the surface of a high speed underwater object. When a object moves near a free surface at very high speed, the cavity signature becomes one of the major factors to be overcome by sensors of military satellite. The present work was to study the free surface effect on the ventilated cavitation. The governing equations were Navier-Stokes equations based on a homogeneous mixture model. The multiphase flow solver used an implicit preconditioning method in the curvilinear coordinate system. The cavitation model used here was the one first presented by Merkle et al.(2006) and redeveloped by Park & Ha(2009). Computations considered the free surface effects were carried out with a NACA0012 hydrofoil and the corresponding results were compared with the experimental data to have a good agreement. Calculations were then performed considering the ventilated cavitation, including the effect of non-condensable gas under the free surface effects.

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References

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