평판 위 흐름 Defect Law 영역의 난류 특성 연구
Investigation of Turbulence Characteristics of Defect Law Region over Flat plate
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초록
To investigate the turbulence characteristics within the boundary layer over a flat plate, an experimental study was performed usinga PIV technique in a circular water channel. For two water velocities, 0.92 and 1.99 m/s, the water velocity profiles were taken and analyzed todetermine turbulent characteristics such as the Reynolds stress, Taylor micro-length scale, and Kolmogorov length scale within the defect law regionof the boundary layer. These analysis methods may be applied to research on the friction drag reduction technology using micro-bubbles or an airsheet over the surface of a ship’s hull, because the physical reason for the friction drag reduction could be found by understanding the variation ofthe turbulence characteristics and structures in the boundary layer.
Abstract
To investigate the turbulence characteristics within the boundary layer over a flat plate, an experimental study was performed usinga PIV technique in a circular water channel. For two water velocities, 0.92 and 1.99 m/s, the water velocity profiles were taken and analyzed todetermine turbulent characteristics such as the Reynolds stress, Taylor micro-length scale, and Kolmogorov length scale within the defect law regionof the boundary layer. These analysis methods may be applied to research on the friction drag reduction technology using micro-bubbles or an airsheet over the surface of a ship’s hull, because the physical reason for the friction drag reduction could be found by understanding the variation ofthe turbulence characteristics and structures in the boundary layer.
참고문헌 (15)
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