Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Experimental Investigation of Two-dimensionality of Flow around the Vertical Fence Submerged in a Turbulent Boundary Layer

난류 경계층에 잠긴 수직벽 주위 유동의 2차원성 연구

  • 차재은 (한국원자력연구원 고속로 기술개발부) ;
  • 김형우 (한국원자력연구원 고속로 기술개발부) ;
  • 김형범 (경상대학교 항공기부품기술연구소)
  • Received : 2009.10.29
  • Accepted : 2010.03.09
  • Published : 2010.03.31
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Abstract

An experimental investigation of the flow around a vertical fence was carried out using a PIV velocity field measurement technique. The vertical fence was embedded in a turbulent boundary layer. The instantaneous velocity fields measured at cross-sectional planes reveal complex longitudinal vortices that vary in size and strength, developing from the upstream location. In the instantaneous vorticity and velocity field data, the shear flow separated from the fence top is highly turbulent and shows unsteady flow characteristics. The topography of the ensemble averaged velocity fields, especially the separation bubble formed behind the fence, shows that the spatial distributions of streamwise velocity (U) and vertical (V) are symmetric, the spanwise velocity (W) is skew-symmetric with respect to the central xy-plane(z=0).

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References

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