Lookup NU author(s): Batuhan Aktas,
Professor Mehmet Atlar,
Dr Noriyuki Sasaki,
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IEEE Conducting noise trials with big merchant vessels could constitute serious economic and time losses for the ship operators. This study aims to introduce an experimental acoustic–visual device enabling economical and cost-effective noise trials in full scale. Noise emission and dynamics of propeller cavitation are investigated on a research vessel equipped with a customized submerged device called “Hydropod” that consists of hydrophones and a high definition, wide-angle underwater camera. Previously conducted noise trials following the international standards with an off-board hydrophone array are utilized for the validation of the adopted approach. The comparisons between the Hydropod measurements and conventional noise trial measurement results have shown promising correlations, except for a self-noise hump present in the noise spectra of the Hydropod measurements. Furthermore, by taking advantage of the replacement of the conventional propellers of the catamaran with a set of new profile technology (NPT) propellers, additional trials were conducted using the Hydropod. This enabled interpretation of the relative performance of both sets of propellers in terms of acoustics and cavitation extent. The NPT propellers were superior compared to the conventional propellers over the cavitation extent and resulting acoustic emissions.
Author(s): Aktas B, Atlar M, Leivadaros S, Sasaki N, Fitzsimmons P
Publication type: Article
Publication status: Published
Journal: IEEE Journal of Oceanic Engineering
Pages: epub ahead of print
Online publication date: 09/01/2018
Acceptance date: 02/04/2016
ISSN (print): 0364-9059
Publisher: Institute of Electrical and Electronics Engineers Inc.
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