Resistance performance of submarine under different traveling stations

The traveling state of submarine in water includes deep in water and near water-surface. Compared with the deep water submerged body, the flow field around a moving submerged body near the free surface is more complex, submerged body will suffer from wave-resistance. Uses ANSYS-ICEM software to build submarine model and computes it with CFX software. The resistance and wave pattern of a submarine model at different depths of submergence are computed. Finally, discusses the wave of free-surface under different state, influence of free surface to the resistance and the reason of the resistance increasing.