평판에서의 공기층 분기에 대한 수치적 연구

초록

There is no need to emphasize the importance of the frictional resistance of ships to both naval architecture and ship owners. It is known that frictional resistance takes about 70 percent of the total resistance of most merchant ships. Therefore, the development of air lubricated ships have been pursued to save fuel costs by reducing the frictional resistance. In this study, the diffusion angle and pattern of air layer generated on the surface of a flat plate were investigated numerically using RANS. First of all, grid resolution test was performed to evaluate the sensitivity of the grid. Air diffusion angle and pattern were compared with experimental data and the diffusion patterns of air layer were investigated through the velocity contour and vector as well as vorticity contour. Finally, the bifurcation mechanism of air layer was investigated.