영압력 구배 난류 경계층에서 표면조도가 미치는 영향
The Effect of Surface Roughness on the Zero Pressure Gradient Turbulent Boundary Layers
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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 Rex=80,000∼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 Rex and w/k are presented.
참고문헌 (8)
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