방오 도료가 도장된 평판에 대한 항력 성능 연구

• Published in: 大韓造船學會 論文集 Vol. 50; no. 6; pp. 399 - 406
• Main Authors: 백부근(Bu-Geun Paik), 김경열(Kyung-Youl Kim), 조성락(Seong-Rak Cho), 안종우(Jong-Woo Ahn), 조상래(Sang-Rae Cho), 김경래(Kyung-Rae Kim), 정용욱(Young-Uok Chung)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2013
• Subjects: 조선공학; Profile drag(단면 항력); Skin friction(마찰 항력); LDV(Laser Doppler Velocimetry; Anti-fouling paint(방오도료); 레이저 속도계; Turbulent boundary layer(난류경계층)
• ISSN: 1225-1143; 2287-7355

In the present study, the flat plate model test method is developed to evaluate the skin friction of the marine coating in the cavitation tunnel. Six-component force balance is used to measure the profile drag of the flat plate and strut. LDV(laser Doppler velocimetry) technique is also employed to evaluate the drag and to figure out the reason of the drag reduction. The flow velocities above the surface can be used to assess the skin friction, combined with direct force measurement. Since the vortical structure in the coherent turbulence structure influences on the skin friction in the high Reynolds number regime, the interaction between the turbulence structure and the surface wall is paying more attention. This sort of thing is important in the passive control of the turbulent boundary layer because the skin friction can't be determined only by wall condition. As complicated flow phenomena exist around a paint film, systematic measurement and analysis are necessary to evaluate the skin friction appropriately.