The flow field is improved for smaller flow separation and vortex, and less fluid nose in sonar detection is expected. With a larger allowance of shape deformation, the maximal reduction could reach slightly higher than 3%. To ensure less influence on the interior equipment installation and to be able to re-use the non-steel dome part, the best resistance reduction is almost 2%. The grid independence was checked for the optimal design in different design stages. The verification and validation was performed for the original hull form against towing tank resistance data. Only the local geometry was fine-tuned considering the back slope and front tip by using Rhinoceros 6. The length, width and depth of the original geometry were maintained. OpenFOAM 6 was applied to analyze the viscous flow around the ship bow and then optimize the sonar dome geometry. The goal is to reduce the ship total resistance and improve the flow field around the sonar dome for the ship design speed. The objective of this study is to design the hull-mounted sonar dome of a ship.
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