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Methodology for improving stern gear design of high speed craft using cfd simulation

Lewis, S.G., Skrzynski, M., Turnock, S.R. and Wright, A.M. (2011) Methodology for improving stern gear design of high speed craft using cfd simulation In Proceedings of the international conference on the design, construction & operation of super & mega yachts conference. Royal Institution of Naval Architects., pp. 67-76.

Record type: Conference or Workshop Item (Paper)

Abstract

Stern gear design for luxury high speed yachts currently relies on an estimation of the inflow velocity at the propeller plane and the propeller race. These components are often located within tunnel features on the hull and the flow regime will be influenced by the vessel trim and planning speed. Typically, the flow into the propeller is taken as an average over the entire propeller area and does not take into account the variation of the flow into the propeller due to appendages and hull shape. Computational fluid dynamics (CFD) simulations allow this variation to be calculated. These data are coupled with a potential based lifting surface program and are used to improve propeller design.

In order to optimise the design of the rudder, the propeller race must be known. A method of introducing the propeller forces back into the CFD flow is investigated. This improved method has the advantage of providing a more accurate flow field into the rudder, which allows the rudder design to be improved. It is expected that this procedure will reduce the rudder drag and cavitation. The development and validation of this CFD methodology applied to high speed planning craft propulsion using open source software is illustrated with regard to two case studies for P bracket and propeller design optimisation, and to estimate the toe-in angle for the rudder in order to align it with the propeller race.

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More information

Accepted/In Press date: 2011
Venue - Dates: conference; it; 2011-05-05; 2011-05-06, Italy, 2011-05-05 - 2011-05-06
Keywords: marine cfd, rudder propeller interaction, ship design
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 188103
URI: http://eprints.soton.ac.uk/id/eprint/188103
PURE UUID: e06ceaa6-7e75-4624-b600-04b9132c0fc8
ORCID for S.R. Turnock: ORCID iD orcid.org/0000-0001-6288-0400

Catalogue record

Date deposited: 20 May 2011 10:30
Last modified: 18 Jul 2017 11:43

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Contributors

Author: S.G. Lewis
Author: M. Skrzynski
Author: S.R. Turnock ORCID iD
Author: A.M. Wright

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