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Estimation of a ship’s nominal wake fraction through full-scale speed trials


Dubois, A and Binns, JR, Estimation of a ship's nominal wake fraction through full-scale speed trials, Proceedings of the 21st Australasian Fluid Mechanics Conference, 10-13 December 2018, Adelaide, pp. 1-4. ISBN 9780646597843 (2018) [Refereed Conference Paper]


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A ship’s nominal wake fraction is a key parameter in the design of the marine propulsion system, i.e. the the marine propulsor and main engine. Determination of the wake fraction is commonly done through empirical formulas and / or based on model-scale experiments. However, a discrepancy exists between the model- and full-scale estimation results because of the way scaling is applied. Speed trials are conducted to estimate the full-scale nominal wake fraction. Results show the ability of the developed speed-trial methodology to provide an initial estimation of the full-scale nominal wake. However, comparison between the empirical, model-scale, and full-scale results fails to provide conclusive results. No real insight into the validity of the estimated full-scale nominal wake fraction could be established. However, the applied methodology is deemed to have value but additional research is required before further conclusions can be drawn.

Item Details

Item Type:Refereed Conference Paper
Keywords:wake, bluefin, full-scale, speed-trials
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Marine engineering
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in engineering
UTAS Author:Dubois, A (Dr Arno Dubois)
UTAS Author:Binns, JR (Professor Jonathan Binns)
ID Code:130378
Year Published:2018
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2019-01-23
Last Modified:2022-09-01
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