CFD를 이용한 표면 거칠기에 따른 선박의 저항 성능 추정에 관한 기초연구

Abstract

In recent, a lot of shipping companies have made an effort to improve the efficiency of vessel in various ways, due to shipping recession and increasing competition between shipping. One of important factor for improving the efficiency of vessel is the resistance performance that is consist of friction and residual resistance. Especially, it is recognized that friction resistance tends to be affected by condition of vessel’s surface and occupies approximately 70~90% in total resistance. In usual, the surface of vessel is covered with various type of paint to reduce fouling and corrosion. As time goes by, however, it is so hull roughness would be increased by fouling over the wetted surface that anti-fouling paints, such as CDP(Controlled Depletion Paint), Tin-Free SPC(Self Polishing Co-polymer) or Foul Release, are applied evenly over the hull surface. Nevertheless, these anti-fouling paints could not prevent from the fouling absolutely. In this study, a fundamental study on evaluating ship resistance performance due to hull roughness has been performed using a commercial software, Star-CCM+, which solves the continuity and Navier-Stokes equations for incompressible and viscous flow. The present simulation results are compared with the experiments under the same condition and the effect of surface roughness to ship resistance performance is discussed.essel is the resistance performance that is consist of friction and residual resistance. Especially, it is recognized that friction resistance tends to be affected by condition of vessel’s surface and occupies approximately 70~90% in total resistance. In usual, the surface of vessel is covered with various type of paint to reduce fouling and corrosion. As time goes by, however, it is so hull roughness would be increased by fouling over the wetted surface that anti-fouling paints, such as CDP(Controlled Depletion Paint), Tin-Free SPC(Self Polishing Co-polymer) or Foul Release, are applied evenly over the hull surface. Nevertheless, these anti-fouling paints could not prevent from the fouling absolutely. In this study, a fundamental study on evaluating ship resistance performance due to hull roughness has been performed using a commercial software, Star-CCM+, which solves the continuity and Navier-Stokes equations for incompressible and viscous flow. The present simulation results are compared with the experiments under the same condition and the effect of surface roughness to ship resistance performance is discussed.