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Note on the Extension of Evvard’s Method to Wings with Subsonic Leading Edges Moving at Supersonic Speeds

Published online by Cambridge University Press:  07 June 2016

G. J. Hancock
G. J. Hancock*
Affiliation:
Queen Mary College, University of London
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Summary

Evvard’s technique is applied to the problem of a thin finite wing moving at a supersonic speed when the leading edge is subsonic. It is developed in two methods:—

  • (i) in which the relationship between the pressure loading and the integrals of the downwash over the wing surface is extended as far as possible, and which has to be computed numerically;

  • (ii) in which approximations are made for the upwash velocities in the neighbourhood of the leading edge, resulting in a series of standard integrals for the estimation of the pressure loading.

Method (ii) is applied to the pressure loading on a flat plate triangular wing and cropped delta wing, and the application to more general shapes is discussed.

Type
Research Article
Information
Aeronautical Quarterly , Volume 8 , Issue 1 , February 1957 , pp. 87 - 102
Copyright
Copyright © Royal Aeronautical Society. 1957

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References

1. Evvard, J. C. Use of Source Distribution for Evaluating Theoretical Aerodynamics of Thin Finite Wings at Supersonic Speeds. N.A.C.A. Report 951, 1950.Google Scholar
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5. Cohen, D. M. Formulae for Supersonic Loading, Lift, Drag of Flat Swept-Back Wings with Leading Edges behind Mach Lines. N.A.C.A. T.N. 1050, 1952.Google Scholar
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