Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Comparison between axisymmetric and 3D models for the evaluation of drag on submarine hulls
Submission Author:
Eduardo de Bittencourt Ribeiro , SC
Co-Authors:
Eduardo de Bittencourt Ribeiro, Thiago Pontin Tancredi, Filipe Dutra da Silva, Ernane Silva
Presenter: Eduardo de Bittencourt Ribeiro
doi://10.26678/ABCM.COBEM2021.COB2021-0409
Abstract
This paper presents a comparison between results obtained with a 3D and an axisymmetric model of a submarine hull. The objective is to obtain an accurate model with low computational cost for such vessels. The chosen geometry is the hull model 4165 from series 58. Numerical errors due to grid refinement and sensitivity to boundary conditions are assessed and validation through comparisons with experimental data is provided. The analyzed Reynolds numbers range from 4e6 to 2.5e7. Results obtained with the axisymmetric grid showed deviations of about 3%, when compared to the experimental data. In contrast, for a 3D model presented in a previous publication, such deviations were up to 8.8%. Even though axisymmetric models may not be useful for analyzing more complex geometries, their lower computational cost and simplified mesh generation process make them suitable for optimization routines. Such simulations can also provide preliminary estimates for the design of the propulsive and maneuvering systems of submarines.
Keywords
Drag computation, Hull design, submarine, OpenFOAM
