3차원 미니밴 형상 주위의 비압축성 점성 유동 해석

Incompressible Viscous Flow Analysis Around a Three Dimensional Minivan-Like Body

  • 정영래 (부산대학교 대학원 기계공학과) ;
  • 박원규 (부산대학교 기계기술연구소) ;
  • 박영준 (부산대학교 대학원 기계공학과) ;
  • 김종섭 (부산대학교 대학원 기계공학과) ;
  • 홍성훈 (현대자동차, 승용제품개발 1연구소)
  • 발행 : 1997.04.01

초록

The flow field around a three dimensional minivan-like body has been simulated. This study solves 3-D unsteady incompressible Navier-Stokes equations on a non-orthogonal curvilinear coordinate system using second-order accurate schemes for the time derivatives, and third/second-order scheme for the spatial derivatives. The Marker-and-Cell concept is applied to efficiently solve continuity equation. A H-H type of multi-block grid system is generated around a three dimensional minivan-like body. Turbulent flows have been modeled by the Baldwin-Lomax turbulent model. To validate present procedure, the flows around the Ahmed body with 12.5° of slant angle are simulated. A good agreement with other numerical results is achived. After code validation, the flows around a mimivan-like body are simulated. The simulation shows three dimensional vortex-pair just behind body. The flow separation is also observed on the rear of the body. It has concluded that the results of present study properly agreed with physical flow phenomena.

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