A Parametric Comparison of the Influence of the Waterjets on the Acoustic Performance of the Sea Vessels (original) (raw)

Great concern has been raised to emphasize significant amount of the underwater noise generated by human activity related to commercial shipping recently. Rising noise levels that is generated by the human activities can negatively impact ocean life especially for marine mammals in both short and long terms. International Maritime Organization (IMO) and other bodies have been trying to set-up guidelines in order to reduce noise levels at sea [IMO, 2014]. As clearly stated in mentioned guidelines, for the prediction purposes of the underwater noises, Computational Fluid Dynamics (CFD) methodologies could be applied to predict and visualize flow characteristics related to hull and appendages as well as propellers. Many researches have been undertaken to measure underwater noise originating from propeller rotation. In addition to propellers, hull shape is also crucial for ship-generated noise. Uneven and non-homogeneous wake fields are known to increase cavitation. Therefore; the ship ...

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