Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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The Effect of Surface Roughness on the Zero Pressure Gradient Turbulent Boundary Layers

영압력 구배 난류 경계층에서 표면조도가 미치는 영향

  • 김문경 (창원전문대학 기계설계과) ;
  • 윤순현 (부산대학교 기계공학부) ;
  • 김동건 (부산대학교 대학원 기계공학과)
  • Published : 2005.05.01
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Abstract

Experiments were conducted to investigate the effect of the surface roughness on the flat plate turbulent boundary layer. The square rods were installed at the leading edge to make surface roughness. The particle image velocimetry was used to measure the mean velocities and velocity fluctuation component. All measurements were made over a range of w/k=1. 2 5 and $Re_x=80.000{\sim}360,000$. Friction velocity was measured by using Clauser plot method. The level of turbulent intensities on roughness surface appears more strongly than that of turbulent intensities on flat plate. A correlation of boundary layer thickness in term of $Re_x$ and w/k are presented.

Keywords

References

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