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On the Performance of the Hovercraft Single-Wall Skirt

Published online by Cambridge University Press:  07 June 2016

A. A. West*
Affiliation:
University College of Swansea
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Summary

A simple analysis is presented for the air flow and nozzle power requirements of hovercraft fitted with skirts on which the peripheral jet is blown down the inner skirt face—the “single-wall” type. The theory, which utilises experimental wall-jet data, is applicable to the equilibrium jet state.

A comparison is made with analyses for the air flow and nozzle power requirements of plenum chamber craft and hovercraft fitted with twin-wall skirts. It is concluded that, for a given gap between the skirt bottom and the terrain, at normal operating conditions the order of merit is twin-wall skirt, single-wall skirt, plenum chamber.

Type
Research Article
Copyright
Copyright © Royal Aeronautical Society. 1967

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References

1. Elsley, G. H. Two-dimensional hovercraft lift. Saunders-Roe unpublished report, 1959.Google Scholar
2. Barratt, M. J. Simple curtain theory and the split jet. Hovercraft Development Ltd unpublished report, 1961.Google Scholar
3. Gabbay, E. J. On the coefficient of contraction for jets from two-dimensional nozzles and valve openings. PhD Thesis, Chelsea College of Science and Technology, 1961.Google Scholar
4. Myers, G. E. et al. Plane turbulent wall jet flow development and friction factor. Transactions of the American Society of Mechanical Engineers, Vol. 85D, Basic Engineering, pp. 47-54, March 1963.Google Scholar
5. Sigalla, A. Measurements of skin friction in a plane turbulent wall jet. Journal of the Royal Aeronautical Society, Vol. 62, p. 873, December 1958.CrossRefGoogle Scholar
6. Schwarz, W. H. and Cosart, W. P. The two-dimensional turbulent wall jet. Journal of Fluid Mechanics, Vol. 10, Part 4, p. 481, 1961.CrossRefGoogle Scholar
7. West, A. A. A single-wall skirt jet performance theory for hovercraft University College of Swansea, Mechanical Engineering Research Report MR/18/66.Google Scholar
8. McDaid, J. W. C. The efficiency of jet curtains. MSc Thesis, Queen’s University, Belfast, June 1965.Google Scholar