Resistance Test

The resistance test is the first in a series of experiments which together provide the basis for a performance prediction of the full scale hull‐propulsor system. This chapter summarizes the procedures for measuring the resistance of a scale model. It discusses test conditions, arrangements, data ac...

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Bibliographic Details
Published inFundamentals of Ship Hydrodynamics p. 1
Main Author Birk Lothar
Format Book Chapter
LanguageEnglish
Published Chichester, UK John Wiley & Sons 2019
John Wiley & Sons, Ltd
Subjects
Froude numbers
full scale hull‐propulsor system
Marine Engineering & Naval Architecture
resistance test
Ships & Vessels
skin friction correction force
towing velocities
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ISBN1118855485
9781118855485
DOI10.1002/9781119191575.ch29

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Summary:The resistance test is the first in a series of experiments which together provide the basis for a performance prediction of the full scale hull‐propulsor system. This chapter summarizes the procedures for measuring the resistance of a scale model. It discusses test conditions, arrangements, data acquisition, and processing of the test results. Resistance tests are routinely performed to confirm the estimates of early ship design. Resistance is measured with a load cell attached to the lower end of a stiff column which itself is fastened to the towing carriage. Tests are conducted for several towing velocities covering the whole range of Froude numbers of interest for the full scale vessel. An additional result of the resistance test is the skin friction correction force. An alternative to applying a specific friction deduction force is to do tests with load variations on the propeller.
ISBN:1118855485
9781118855485
DOI:10.1002/9781119191575.ch29