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TECHNICAL PAPERS

Some Aspects of the Aerodynamics of Gurney Flaps on a Double-Element Wing

[+] Author and Article Information
David Jeffrey, Xin Zhang

School of Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom

David W. Hurst

Department of Aerospace Engineering, Glasgow University, Glasgow, United Kingdom

J. Fluids Eng 123(1), 99-104 (Aug 28, 2000) (6 pages) doi:10.1115/1.1334376 History: Received February 03, 2000; Revised August 28, 2000
Copyright © 2001 by ASME
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References

Liebeck,  R. H., 1978, “Design of subsonic airfoils for high lift,” AIAA J. Aircraft, 15, No. 9, Sept., pp. 547–561.
Papadakis, M., Myose, R. Y., Heron, I., and Johnson, B. L., 1996, “An experimental investigation of Gurney flaps on a GA(W)-2 airfoil with 25% slotted flap,” AIAA Paper 96-2418, June.
Papadakis, M., Myose, R. Y., and Matallana, S., 1997, “An experimental investigation of Gurney flaps on a two element general aviation airfoil,” AIAA Paper 97-0728, Jan.
Myose,  R., Papadakis,  M., and Heron,  I., 1998, “Gurney flap experiments on airfoils, wings, and reflection plane model,” AIAA J. Aircraft, 35, No. 2, Mar.–Apr., pp. 206–211.
Jeffrey, D., 1998, An Investigation Into the Aerodynamics of the Gurney Flap, Ph.D. thesis, University of Southampton, July.
Jeffrey,  D., Zhang,  X., and Hurst,  D. W., 2000, “Aerodynamics of Gurney flaps on a single-element high-lift wing,” AIAA J. Aircraft, 37, No. 2, Mar.–Apr., pp. 295–301.
Press, W., Teukolshy, A. S., Vetterling, W., and Falnnery, B. P., 1992, Numerical Recipes in FORTRAN, Vol. 1, Cambridge University Press, pp. 569–577.
Roshko, A., 1954, “On the drag and shedding frequency of two-dimensional bluff bodies,” NACA TN 3169, July.
Good,  M. C., and Joubert,  P. N., 1968, “The form drag of two-dimensional bluff-plates immersed in turbulent boundary layers,” J. Fluid Mech., 31 ,Part 3, Feb., pp. 547–582.

Figures

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Double-element generic airfoil with 4 percent Gurney fitted at α=0 deg,δf=20 and 50 deg
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Forces: CL versus α. (a) δf=20 deg, (b) δf=50 deg.
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Forces: CD versus CL. (a) δf=20 deg, (b) δf=50 deg.
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Chordwise pressure at α=3 deg. (a) δf=20 deg, (b) δf=50 deg.
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Mean velocity vectors and streamlines at δf=20 deg and α=−5 deg: (a) clean wing and (b) 4 percent Gurney
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Turbulent kinetic energy (TKE) distribution at δf=20 deg and α=−5 deg, with 4 percent Gurney
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Mean velocity vectors and streamlines at δf=50 deg and α=−5 deg: (a) clean wing and (b) 4 percent Gurney
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Turbulent kinetic energy (TKE) distribution at δf=50 deg and α=−5 deg, with 4 percent Gurney

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