Analysis of resistance and flow field of submarine sailing near the ice surface

  Objectives  This paper studies the hydrodynamic performance of the submarine sailing near the ice surface using numerical simulation method.

  Methods  the Suboff full-appended model, RANS method, SST k-ω turbulence model and volume of field method are used to calculate the hydrodynamic performance of the submarine in the STAR-CCM+ software. The effectiveness of the calculation method is guaranteed by the method of grid independence verification and the method of hydrodynamics analysis near the ice surface.

  Results  The results show that when the submarine sails under ice surface, the total resistance coefficient of submarine decreases with the increase of the submergence depth at the same Froude number, and decreases with the increase of Froude number at the same depth. In addition, when the dimensionless depth is greater than 1.63, the submergence hardly affects the drag coefficient.

  Conclusions  Studies have shown that the total drag coefficient of submarine is greatly influenced by Froude number and submergence depth. With the increase of submergence depth, the influence of submergence depth on drag coefficient decreases gradually.