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Lift augmentation on a moderately swept wing by spanwise blowing

Published online by Cambridge University Press:  04 July 2016

Kenneth P. Clarke
Kenneth P. Clarke*
Affiliation:
Cranfield Institute of Technology*
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Extract

At present it is still very difficult to predict for a given incidence, sweep-angle, leading-edge shape and Reynolds Number, whether the flow around a wing will remain attached or separate either from the upper surface as a bubble or from the leading edge as a vortex sheet which rolls up above the wing. Various attempts have been made to remove this uncertainty and it was suggested by Küchemann that it should be possible to design wings which combine coiled vortex sheets, originating from the inner part of the leading edge, with attached flow over the leading edge of the outer part of the wing. In this way some of the properties of slender wings could be combined with some properties of swept wings. His original model consisted of a swept-wing planform modified by inboard leading-edge wing strakes, the purpose of the latter being to provide the inboard vortex sheets. A similar idea has now been used in the wing design of the YF-16 lightweight fighter.

Type
Technical note
Information
The Aeronautical Journal , Volume 80 , Issue 790 , October 1976 , pp. 447 - 451
Copyright
Copyright © Royal Aeronautical Society 1976 

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Footnotes

*

Now at the Empire Test Pilots’ School, Aeroplane and Armament Experimental Establishment, Boscombe Down.

References

1. Küchemann, D. On the possibility of designing wings that combine vortex flows with classical aerofoil flows. Tech Memo Aero 1363, October 1971.Google Scholar
2. Clarke, K. P. Lift augmentation on a moderately sweptwing by spanwise blowing. Cranfield Institute of Technology MSc thesis, September 1975.Google Scholar
3. Dixon, C. J. Lift augmentation by lateral blowing overlifting surface. AIAA Paper No 69-193, February 1969.Google Scholar
4. Cornish, J. J. High lift applications of spanwise blowing. ICAS Paper 70-09, September 1970.Google Scholar
5. Dixon, C. J., Theisen, J. G. and Scruggs, R. M. Theoretical and experimental investigations of vortex lift control by spanwise blowing. AD 771-290, Vol 1, September 1973.Google Scholar
6. Bradley, R. G. and Wray, W. O. A conceptional study of leading-edge vortex enhancement by blowing. Journal of Aircraft, Vol 11, No 1, January 1974.Google Scholar
7. Bradley, R. G., Wray, W. O. and Smith, C. W. An experimental investigation of leading-edge vortex augmentation by blowing. NASA CR 132415, April 1974.Google Scholar
8. Polhamus, E. C. Predictions of vortex lift characteristics by a leading-edge suction analogy. Journal of Aircraft, Vol 8, No 4, April 1971.Google Scholar
9. Polhamus, E. C. Charts for predicting subsonic vortex lift characteristics of arrow, delta and diamond wings. NASA TN-D 6243, April 1971.Google Scholar