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Vibration control by propeller design

Lookup NU author(s): Dr Noriyuki Sasaki

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Abstract

Propeller research has generally been focussed on improving the open water efficiency, and by considering the various energy losses associated with the marine screw propeller, it can be seen that for a design brief with given main engine power and RPM input, plus a thrust requirement defined by the specified ship speed, the most fruitful area for improvement in efficiency by propeller design is a reduction in energy losses. The simple way to increase the efficiency is reduction of blade area, increasing load near the tip and adopting a larger diameter with low RPM. However, vibration and noise will be the first issues when a designer tries to increase the efficiency of the propeller by these ways. This paper will present a simple prediction method of pressure fluctuations induced by thickness, propeller loading and unsteady cavitation taking not only propeller dimensions but also stern shape into account at the beginning of the propeller design. (C) 2015 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Bodger L, Helma S, Sasaki N

Publication type: Article

Publication status: Published

Journal: Ocean Engineering

Year: 2016

Volume: 120

Pages: 175-181

Print publication date: 01/07/2016

Online publication date: 02/02/2016

Acceptance date: 05/10/2015

ISSN (print): 0029-8018

ISSN (electronic): 1873-5258

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.oceaneng.2015.10.006

DOI: 10.1016/j.oceaneng.2015.10.006

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