Analysis Of The Resistance Of Submarine In Different Working Positions

The characteristics of the flow, especially wake flow and the flow near the appendage around a submarine, not only have a direct effect on the hydrodynamic performance of the submarine, but also are the main source of the hydrodynamic noises of the submarine. An effective numerical simulation method to predict the characteristics of the flow is a very important research problem in the ship hydrodynamics.The flow over a revolution body is a classical problem in the CFD. So simulating the flow over a revolution body can be used to validate the numerical computational program. Then CFX5.6, a kind of CFD software, is adopted to build graphical models, pre-process and post-process for submarine model. The finite volume method, a kind of computational method frequently used in CFD, is adopted. And numerical simulations of the three dimension viscous flow over the SUBOFF-1 models sailing in different angles(0°,3°,6°,9°) which are provided by DARPA are processed. Computational results of this paper are consistent with test data. It shows numerical simulation method in this paper is available.Then, numerical simulations of the three-dimensional viscous flow over the SUBOFF–8 submarine models with full appendages sailing in different angles(0°,3°,6°,9°) are processed. The SUBOFF–8 submarine model is provided by DARPA. Wake velocities at the propeller disk plane, pressure coefficient and skin friction coefficient are given, and vortices structured from the fairwater are partly observed from the velocity vectors. Computational result of this paper is almost consistent with test data.This paper is very valuable by considering the reduction of submarine resistance and hydrodynamic noise, the improvement of submarine concealment and the development of new concept design as well as the validation of the design effect on submarine model.