Study on resistance characteristics of submarine near water surface

The submarine is usually affected by free surface and the navigation resistance increases when sailing near surface. In order to study specific characteristics of surface, SUBOFF with appendages was taken as research object, calculation model built based on Star CCM+ fluid simulation software, coefficients under different depths speeds were calculated. Through comparative analysis, influence depth speed components obtained, cause formation analyzed. results show that friction coefficient small in general. With increase submarine, pressure decreases, wave amplitude decreases. shear Kelvin system more obvious effect scattering weakened, which great significance for concealment. speed, overall change trend first increased then interference between hull decreases at each depth. shape changes mutually confirm. mainly generates waves interacting hull, affects submarine. greatly