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On the movement of ships in restricted waterways

Published online by Cambridge University Press:  28 March 2006

T. Constantine
T. Constantine
Affiliation:
Department of Civil Engineering, Manchester University
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Abstract

In this paper some simple theoretical considerations concerning the movement of ships in restricted waterways are discussed, and it is shown that for a ship towed from the bank, or by any external force, there are three distinct speed ranges: subcritical, critical and supercritical. In the subcritical and supercritical ranges, Bernoulli's equation and the continuity equation are satisfied everywhere by a state of steady motion relative to the ship, but in the critical range these laws require that a quantity of fluid is piled up continuously ahead of the ship in the form of a bore. Experimental confirmation is given by means of photographs of model tests.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 9 , Issue 2 , October 1960 , pp. 247 - 256
Copyright
© 1960 Cambridge University Press

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References

Krietner, J. 1934 Über den Schiffswiderstand auf beschranktem Wasser. Werft Reederei Hafen.Google Scholar
Lap, A. J. W. 1950 Fundamentals of Ship Resistance and Propulsion, Part A, Resistance. Netherlands Ship Model Basin.
Stoker, J. J. 1957 Water Waves. New York: Interscience.