# Examination of the vessel's shape, resistive force and volumetric-aqueous efficiencies to optimize the vessels' foil under noise propagation

## TL;DR

This paper explores how optimizing a vessel's shape can reduce noise and improve efficiency.

## Contribution

The study introduces a new method using CFD to optimize hull shapes for reduced hydro-acoustic noise.

## Key findings

- Optimizing the hull's hydrodynamic form significantly reduces noise propagation.
- The cylindrical part of the hull is crucial for volumetric and aqueous efficiency.
- The optimized hull design increases turbulence damping potential.

## Abstract

There are several parameters in designing undersurface vessel forms, the most important of which is the hull's total strength, which includes the strength of the hull and its attachments. According to studies, 70 % of the total strength of the vessels is related to their hull only without attachments. The hull has three major parts: nose, cylinder, and heel. The advanced vessels' architecture has a parallel shape (cylinder shape). This cylindrical part is important in examining the used volume by pilots and vessel equipment. This paper uses the CFD method to examine the vessel's shape, and the resistive force and volumetric-aqueous efficiencies are extracted. An optimum profile is extracted by the values of resistive force and volumetric-aqueous efficiencies. The results indicate the significant effect of the hull form on the hydro-acoustic noise of the hull. In other words, by optimizing the hydrodynamic form of the hull, the noise propagation can be reduced as much as possible. Also, the linear slope of the optimized hull is not optimized more than the hull. This means that the turbulence caused by the optimized hull has a higher damping potential.