| 선체 표면 거칠기가 경계층 변화에 미치는 영향 |
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김옥석, 오우준, 손창배, 이경우 |
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| On the Variation of the Boundary Layer as Hull Surface Roughness |
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Ok-Sok Gim, Woo-Jun Oh, Chang-Bae Shon, Gyoung-Woo Lee |
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| Abstract |
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The experimental study of the hull surface roughness on a developing turbulent boundary layer which exposed to a variety of operating environments were investigated by performing particle image velocimetry(PIV) in a circulating water channel. The Reynolds number based on the width of roughness was about Re=1000. the roughness elements used were periodically arranged two-dimensionally. the flow visualization, time-mean velocity fields and vorticity fields to measure the flow characteristics were obtained. The investigation shows that the vortex generation and its progress inside the walls. And the center of the vortex was located at the middle of the height of the surface roughness. |
| Key Words:
Surface roughness;PIV analysis;Flow visualization;Velocity field;Vorticity |
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