Unsteady effects during resistance tests on a ship model in a towing tank

Lawrence J. Doctors, Alexander Day, David Clelland

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

It is known that there are oscillations in the wave resistance during the constantvelocity phase of a towing-tank resistance test on a ship model. In this work, the unsteady thin-ship resistance theory has been applied to this case. The results have been compared with experiment data obtained using a towing carriage the velocity history of which can be programmed. It is demonstrated here that generally excellent correlation exists between the theory and the experiments. In particular, one can predict the influence of Froude number, rate of acceleration, and type of smoothing of the acceleration on the characteristics of the oscillations. These characteristics include the amplitude, rate of decay, frequency, and phasing of the oscillations in the curve of wave resistance versus time.
LanguageEnglish
Pages263-273
Number of pages11
JournalJournal of Ship Research
Volume52
Issue number4
Publication statusPublished - Dec 2008

Fingerprint

Ship model tanks
Ship models
Ship
Froude number
Oscillation
Drag
Experiments
Model
Experiment
Smoothing
Decay
Predict
Resistance

Keywords

  • hydrodynamics
  • model testing
  • resistance
  • naval engineering

Cite this

Doctors, Lawrence J. ; Day, Alexander ; Clelland, David. / Unsteady effects during resistance tests on a ship model in a towing tank. In: Journal of Ship Research. 2008 ; Vol. 52, No. 4. pp. 263-273.
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Unsteady effects during resistance tests on a ship model in a towing tank. / Doctors, Lawrence J.; Day, Alexander; Clelland, David.

In: Journal of Ship Research, Vol. 52, No. 4, 12.2008, p. 263-273.

Research output: Contribution to journalArticle

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