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Evaluation of Two-Dimensional Subsonic Oscillatory Airforce Coefficients and Loading Distributions

Published online by Cambridge University Press:  07 June 2016

Deborah J. Salmond*
Affiliation:
Royal Aircraft Establishment, Farnborough, Hampshire
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Summary

A method is described for calculating numerically the aerodynamic stiffness and damping coefficients and loading distributions for a two-dimensional thin aerofoil oscillating harmonically in subsonic flow, from the Possio Integral Equation by approximating the loading by a finite series of basis functions. Sample loading distributions obtained by using the method are presented for a Mach number of 0.9 and a frequency parameter of 0.4.

Type
Research Article
Copyright
Copyright © Royal Aeronautical Society. 1981

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References

1 Possio, C. The aerodynamic forces on an oscillation profile in a compressible fluid at subsonic speed. ARC Report 3799, 0.128, October 1938, translated from the Italian: L’Aerotecnica, Vol. 18, pp 441458, 1938.Google Scholar
2 Dietze, F. The air forces for the harmonically oscillating aerofoil in a compressible medium at subsonic speeds (two-dimensional problem). ARC 10, 219, 0.633, 1946.Google Scholar
3 Minhinnick, I.T. Subsonic aerodynamic flutter derivatives for wings and control surfaces. RAE Report Structures 87, 1950.Google Scholar
4 Jordan, P.F. Aerodynamic flutter coefficients for subsonic, sonic and supersonic flows (linear two-dimensional theory). RAE Report Structures 141, 1953.Google Scholar
5 Zwaan, R.J. On a kernel-function method for the calculation of the pressure distribution on a two-dimensional wing with harmonically oscillating control surface in subsonic flow. NLR-TR F.261, 1968.Google Scholar
6 Minhinnick, I.T. Tables of functions for evaluation of wing and control surface flutter derivatives for incompressible flow. RAE Report Structures 86, 1950.Google Scholar
7 Joyce, Theresa M. Programs for evaluating flutter derivatives in oscillating two-dimensional incompressible and supersonic flow. Unpublished MOD(PE) material.Google Scholar
8 Davies, D.E. An application of Flax’s variational principle to lifting surface theory. ARC R & M No. 3564, 1967.Google Scholar
9 Salmond, Deborah J. Evaluation of two-dimensional subsonic oscillatory air-force coefficients and loading distributions. RAE Technical Report 79096, 1979.Google Scholar