잠수함에 작용하는 유체동력학적 힘과 모멘트의 수치해석

Abstract

The finite volume based multi-block RANS code is used to simulate the turbulent flows around a submarine with the realizable k- turbulence model. RANS methods are verified and validated at the level of validation uncertainty 1.54% of the stagnation pressure coefficient for the solution of the turbulent flows around a submarine model without appendages. Another submarine configuration including stern appendages is also validated with the experimental data of the nominal wake and hydrodynamic forces and moments. The hydrodynamic coeffi-cients acting on a submarine model are predicted at several drift angles. The computed results are in good agreement with experimental data. Furthermore, it is noteworthy that all the compu-tations were carried out in a PC and the CPU time required for 2.8 million grids was about 20 hours to get the fully converged solution. The current study shows that CFD can be a very use-ful and cost effective tool for the prediction of the hydrodynamic performance of a submarine.