Effects of Opening on Underwater Vehicle’s Resistance and Acoustics

Abstract

In this paper, the effects of the opening’s shape, position and the grille plant orientation on underwater vehicle’s resistance and acoustics are studied by CFD tools. SST - and DES method has been implemented to simulate three related series objects which had resistance experiments. The comparison of CFD simulation results and experiment data shows a good agreement, illustrating that the different flow mixture leads to the different resistance and acoustics. Moreover, it finds that the eigenfrequency of the entire acoustic field is related to the opening length in the inflow direction.