평판 위 흐름 Defect Law 영역의 난류 특성 연구

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 28; no. 4; pp. 268 - 273
• Main Authors: 서성부(Sung-Bu Suh), 박일룡(Il-Ryong Park), 정광효(Kwang-Hyo Jung), 임정관(Jung-Gwan Lim), 김광수(Kwang-Soo Kim), 김진(Jin Kim)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2014
• Subjects: 해양공학; Reynolds stress 레이놀즈응력; Particle image velocimetry 입자영상유속계; Taylor micro length scale 테일러 미시 길이척도; Turbulent boundary layer 난류 경계층; Kolmogorov length scale 콜모고로프 길이 척도
• ISSN: 1225-0767; 2287-6715

To investigate the turbulence characteristics within the boundary layer over a flat plate, an experimental study was performed using a 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 to determine turbulent characteristics such as the Reynolds stress, Taylor micro-length scale, and Kolmogorov length scale within the defect law region of the boundary layer. These analysis methods may be applied to research on the friction drag reduction technology using micro-bubbles or an air sheet over the surface of a ship's hull, because the physical reason for the friction drag reduction could be found by understanding the variation of the turbulence characteristics and structures in the boundary layer.