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유동가시화 기법을 이용한 평판의 마찰 항력 계측 및 해석Skin Friction Measurement and Its Analysis Using Flow Visualization Techniques

Other Titles
Skin Friction Measurement and Its Analysis Using Flow Visualization Techniques
Authors
백부근김경열김재화김광수안종우김기섭
Issue Date
25-11월-2013
Publisher
한국해양과학기술원
Keywords
flow visualization; skin friction; PIV(particle image velocimetry); LDV(laser Doppler velocimetry); POD(proper orthogonal decomposition)
Citation
선박해양기술, v.1, no.53, pp 19 - 26
Pages
8
Journal Title
선박해양기술
Volume
1
Number
53
Start Page
19
End Page
26
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8058
Abstract
Recently, the study on the drag reduction caused by marine coating has been conducted actively through the force measurement technique. In addition to this, flow visualization techniques can be also utilized to investigate the drag reduction effect. Turbulent flow properties on the wall are revealed through measuring its boundary layer by LDV(laser Doppler velocimetry) technique. Instead of the direct measurement of the friction velocity, the difference of the normalized velocity U+ is used to fit it. PIV(particle image velocimetry) technique is also employed to obtain the information on drag coefficient from the wake analysis. Finally, POD(proper orthogonal decomposition) method is used to analyze the velocity fields on the wall, to understand the dominant turbulent flow structures and the possible mechanism of skin friction reduction.n effect. Turbulent flow properties on the wall are revealed through measuring its boundary layer by LDV(laser Doppler velocimetry) technique. Instead of the direct measurement of the friction velocity, the difference of the normalized velocity U+ is used to fit it. PIV(particle image velocimetry) technique is also employed to obtain the information on drag coefficient from the wake analysis. Finally, POD(proper orthogonal decomposition) method is used to analyze the velocity fields on the wall, to understand the dominant turbulent flow structures and the possible mechanism of skin friction reduction.
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지능형선박연구본부 (함정공학연구센터)
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