지면에 근접한 정사각주 주변의 유동장 연구

Investigation on the Flowfield Around a Square Cylinder near a Wall

  • 황재호 (서울대학교 대학원 항공우주공학과) ;
  • 박영회 (서울대학교 대학원 항공우주공학과) ;
  • 김태윤 (서울대학교 대학원 항공우주공학과) ;
  • 이동호 (서울대학교 항공우주공학과)
  • 발행 : 2001.06.27

초록

This paper presents unsteady computational investigations and wind tunnel tests on the flow field around a square cylinder with a gap between the body and the ground plane. Two-dimensional unsteady, incompressible Navier-Stokes codes are developed for the computation of the viscous turbulent flows. By computing the flow around a square cylinder without ground effect, three two-equation turbulence models are evaluated and the developed code is validated. The results show a good agreement with experimental values and other computational results. Critical gap height at which the formation of Karman vortex streets is interrupted, is demonstrated and another transition regime is pointed out

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