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Ship powering prediction from isolated load-varying test data

Citation

Molloy, S and Bose, N, Ship powering prediction from isolated load-varying test data, Proceedings of 6th Canadian Marine Hydromechanics and Structures Conference, 23-26 May, 2001, Vancouver, British Columbia (2001) [Non Refereed Conference Paper]


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Abstract

A method for predicting full-scale ship powering performance from model load-varying self-propulsion test data is presented. The method uses load varying tests in isolation of resistance and/or propeller open water tests. Although presented here for a conventional twin screw icebreaker, the method is being developed as an alternative to conventional lITC 1978 based methods for ships fitted with unconventional propulsors, including those using podded propulsion systems. Values of a form factor, a resistance and a thrust deduction fraction are found from an analysis of the under/overload tests. The full scale torque and thrust coefficients are estimated from the model propeller data in the behind condition. The method is illustrated by using model test data for the Canadian R-Class icebreaker for which corresponding full-scale trials results are available. Comparisons are made of the results with an extrapolation done using the lITC 1978 method. The effects of use of different friction lines are also discussed.

Item Details

Item Type:Non Refereed Conference Paper
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Marine Oceanic Processes (excl. climate related)
Author:Bose, N (Professor Neil Bose)
ID Code:47458
Year Published:2001
Deposited By:Australian Maritime College
Deposited On:2007-09-15
Last Modified:2013-08-14
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