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The Oscillating Two-Dimensional Aerofoil Between Porous Walls

Published online by Cambridge University Press:  07 June 2016

D. G. Drake
D. G. Drake*
Affiliation:
Department of Aeronautical Engineering, University of Southampton
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Summary

The compressible flow past an oscillating two-dimensional aerofoil in a wind tunnel with porous walls is considered, using linearised theory. The porous wall is assumed to have the property that the ratio of the normal velocity at the wall to the pressure drop across the wall is constant. Transform theory is used to find the supersonic longitudinal stability derivatives, and an extension of Possio's integral equation for the quasi-stationary case in subsonic flow.

Information

Type
Research Article
Information
Aeronautical Quarterly , Volume 8 , Issue 3 , August 1957 , pp. 226 - 239
Copyright
Copyright © Royal Aeronautical Society. 1957

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References

1. Baldwin, B. S., Turner, J. B. and Knechtel, E. D. Wall Interference in Wind Tunnels with Slotted and Porous Boundaries at Subsonic Speeds. N.A.C.A. T.N. 3176, May 1954.Google Scholar
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3. Miles, J. W. The Compressible Flow past an Oscillating Airfoil in a Wind Tunnel. Journal of the Aeronautical Sciences, Vol. 23, No. 7, July 1956.CrossRefGoogle Scholar
4. Drake, D. G. The Motion of an Oscillating Aerofoil in a Compressible Free Jet. Journal of the Royal Aeronautical Society, Vol. 60, September 1956.CrossRefGoogle Scholar
5. Goodman, T. R. The Porous Wall Wind Tunnel. Part II—Interference Effect on a Cylindrical Body in a Two-Dimensional Tunnel at Subsonic Speed. Cornell Aeronautical Laboratory, Report AD-594-A-3, 1950.Google Scholar
6. Phillips, E. G. Functions of a Complex Variable, p. 133, Oliver and Boyd, Edinburgh, 1951.Google Scholar