Numerical Investigation of the Resistance and Static Drift Condition of the Autosub Submarine

Abstract

This study involves the force and moment calculations using the 3/4rd scale model and full-scale geometries of the Autosub submarine. Computational fluid dynamics calculations are performed using RANS equations and the k-ω turbulence models. The resistance analyses are conducted for speeds ranging from 0 to 2 m/s. Static drift analyses are conducted between the range of 0 to 10 degrees drift angles at 2 degrees intervals. A mesh independence study is carried out to determine the adequate mesh density. The mesh structure is determined in the analyses for 6 degrees of drift angle and this mesh structure is used for other drift angles, and the results are compared with experimental results from open literature. Full-scale resistance analyses are conducted, and the calculated resistance forces are compared with the experimental and empirical data. The force and moment values obtained from static drift and resistance analyses are found to be consistent with experimental results in the literature.