잠수함 운동시 작용하는 유체동력학적 힘과 모멘트의 RANS 해석

Abstract

The finite volume based multi-block RANS code, WAVIS developed at KRISO, is used to simulate the turbulent flows around a submarine with the realizable k-ε turbulence model. RANS methods are applied and validated for the solution of the turbulent flows around SUBOFF submarine model with four identical stern appendages by comparing the experimental data of the nominal wake and hydrodynamic coefficients. For the realistic application, the hydrodynamic forces and moments for a practical submarine are predicted at several drift and pitch angles. The computed results are in extremely good agreement with experimental data. It is noteworthy that all the computations at the present study were carried out in a PC and the CPU time required for 1.4 million grids was about 20 hours to get fully converged solution. The current study shows that CFD can be a very useful and cost effective tool for the prediction of the hydrodynamic performance of a submarine in the basic design stage.