Aerodynamics of Gurney flaps on a wing in ground effect
Aerodynamics of Gurney flaps on a wing in ground effect
A study was performed of a single-element, high-lift wing fitted with Gurney flaps in ground effect. The effect of the Gurney has been quantified in terms of aerodynamic performance and flow field characteristics. The results are of direct relevance to both aeronautical and racing car applications. The qualitative performance of the Gurney in ground effect compares with freestream; the normal force of the wing is increased and a sharper stall results. Laser Doppler anemometry was used to investigate the effect of the Gurney on the turbulent wake characteristics behind the wing. Particle image velocimetry was employed to elucidate the unsteady flow behind the Gurney, which is characterized by a street of alternately shedding, discrete vortices away from the ground. When flow starts to separate from the trailing edge of the suction surface, the stall mechanism in ground effect, an unsteady wake results and the aerodynamic performance deteriorates.
772-780
Zerihan, Jonathan
c71e1585-69bf-4085-8d62-8826452cfc7d
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
2001
Zerihan, Jonathan
c71e1585-69bf-4085-8d62-8826452cfc7d
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Zerihan, Jonathan and Zhang, Xin
(2001)
Aerodynamics of Gurney flaps on a wing in ground effect.
AIAA Journal, 39 (5), .
Abstract
A study was performed of a single-element, high-lift wing fitted with Gurney flaps in ground effect. The effect of the Gurney has been quantified in terms of aerodynamic performance and flow field characteristics. The results are of direct relevance to both aeronautical and racing car applications. The qualitative performance of the Gurney in ground effect compares with freestream; the normal force of the wing is increased and a sharper stall results. Laser Doppler anemometry was used to investigate the effect of the Gurney on the turbulent wake characteristics behind the wing. Particle image velocimetry was employed to elucidate the unsteady flow behind the Gurney, which is characterized by a street of alternately shedding, discrete vortices away from the ground. When flow starts to separate from the trailing edge of the suction surface, the stall mechanism in ground effect, an unsteady wake results and the aerodynamic performance deteriorates.
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Published date: 2001
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Local EPrints ID: 21755
URI: http://eprints.soton.ac.uk/id/eprint/21755
ISSN: 0001-1452
PURE UUID: a8d8e75e-07d6-4f09-941b-17cb0e831943
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Date deposited: 15 Mar 2006
Last modified: 08 Jan 2022 03:47
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Author:
Jonathan Zerihan
Author:
Xin Zhang
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