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Ship powering prediction from self-propulsion load varying tests
Citation
Molloy, S and Bose, N, Ship powering prediction from self-propulsion load varying tests, SP2001, Lavrentiev Lectures [possibly not a conference publication????], 19-21 June 2001, St. Petersburg, Russia, pp. 133-142. (2001) [Non Refereed Conference Paper]
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Abstract
A method is presented for predicting full-scale ship powering performance from model load-varying test
data. The method follows the recommendations for powering prediction of the Specialist Committee on
Unconventional Propulsors of the 22nd IITC: specifically, that ship models fitted with unconventional
propulsors should be tested as a unit and not broken down into component tests of hull, propulsor, rotor
and stator components, and that extrapolation of full scale powering should be done using self propulsion
load varying tests of the geometrically similar ship model and geometrically similar propulsor. 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. Results are presented for a conventional twin screw icebreaker for which self-propulsion
data and full scale trials results were available. Comparisons are made between the results and an
extrapolation done using the IITC 1978 method. The effects of using different friction lines are discussed
and included in the analysis. A discussion of the choice of appropriate correlation coefficients is included.
Item Details
Item Type: | Non Refereed Conference Paper |
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Research Division: | Biological Sciences |
Research Group: | Ecology |
Research Field: | Marine and estuarine ecology (incl. marine ichthyology) |
Objective Division: | Environmental Management |
Objective Group: | Marine systems and management |
Objective Field: | Oceanic processes (excl. in the Antarctic and Southern Ocean) |
UTAS Author: | Bose, N (Professor Neil Bose) |
ID Code: | 47453 |
Year Published: | 2001 |
Deposited By: | Australian Maritime College |
Deposited On: | 2007-09-15 |
Last Modified: | 2013-10-23 |
Downloads: | 5 View Download Statistics |
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