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An Investigation of Hovercraft Wavemaking

Published online by Cambridge University Press:  04 July 2016

N. Hogben
N. Hogben*
Affiliation:
Ship Division, National Physical Laboratory
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Abstract

The main purpose of the investigation has been to clarify the definition of hovercraft wavemaking resistance and to improve understanding of the physical mechanism. The most literal definition of wave resistance as the force which makes the waves is proposed and its practical and theoretical implications are considered. Various interim accounts of this work have already been written, but the time now seems appropriate to assemble and review the overall picture which is emerging.

The pattern of forces on a hovercraft over water is often difficult to analyse because of the complicated interaction between wavemaking, jet air momentum, cushion pressure, wetting and other effects. It is important, however, in making power predictions that the physical interpretation and corresponding scaling laws of the various forces should be understood. A significant feature of the present approach is that a positive and unambiguous basis for identifying the wavemaking force is offered and compared with theoretical predictions. This force, according to the definition proposed, is assured a proper compliance with the physical laws which govern the waves generated and the corresponding scaling and interference effects, which are predicted by theory.

Type
Twenty-First British Commonwealth Lecture
Information
The Aeronautical Journal , Volume 70 , Issue 662 , February 1966 , pp. 321 - 329
Copyright
Copyright © Royal Aeronautical Society 1966

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References

1.Alexander, A. J. Incidence Effects on a Static Hovercraft. Ship Division Report SHR 62, 1965.Google Scholar
2.Crewe, P. R. and Eggington, W. J.The Hovercraft—A New Concept in Maritime Transport. Trans RINA, Vol. 102, p. 315, 1960.Google Scholar
3.Everest, J. T. Factors Affecting Hovercraft Performance at Low Speed over Water. Ship Division Technical Memo randum SHT 48, 1964.Google Scholar
4.Gadd, G. E. and Hogben, N. The Resistance of Wavemaking Bodies in the Light of Measurements of the Surface Wave Pattern. Ship Division Report No. 43, 1963.Google Scholar
5.Havelock, T. H. The Theory of Wave Resistance. Proc Roy Soc A, 138,1932.Google Scholar
6.Hogben, N. Static Rig Pressure and Airflow Measurements on a Circular Hovercraft Model. Ship Division Technical Memorandum No. 21, 1962.Google Scholar
7.Hogben, N.Interim Report on a Study of Hovercraft Wave-making. Ship Division Technical Memorandum No. 25, 1963. Abstract of a lecture delivered to a Seminar on Hovercraft at Southampton University, also reported in Hovering Craft and Hydrofoil, Vol. 2, No. 6, March 1963a.Google Scholar
8.Hogben, N. Wave Steepness Limitations on Hovercraft Wave Resistance. Ship Division Technical Memorandum SHT 30, 1963b.Google Scholar
9.Lamb, H.Hydrodynamics. Cambridge University Press, 1932.Google Scholar
10.Newman, J. N. and Poole, F. A. P.The Wave Resistance of a Moving Pressure Distribution in a Canal. Schiffstechnik. Vol. 9, No. 45, 1962.Google Scholar
11.Wehausen, J. V.Surface Waves. Section 21. Handbuch der Physik, Vol. 9, Spring Verlag, 1961.Google Scholar