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 flowfield 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.
Aerodynamics of gurney flaps on a wing in ground effect
Aerodynamik eines Tragflügels mit Gurney-Klappe in Bodennähe
AIAA Journal ; 39 , 5 ; 772-780
2001
9 Seiten, 10 Bilder, 3 Tabellen, 22 Quellen
Aufsatz (Zeitschrift)
Englisch
Abreißen der Strömung , Auftriebsbeiwert , Bodeneffekt , Druckverteilung , Klappe , Laser-Doppler-Anemometrie , Lasermesstechnik , Normalkraft , Partikelströmung , Strömungsgeschwindigkeitsmessung , Tragflügelumströmung , turbulente Strömung , Widerstandsbeiwert , Wirbelablösung , Wirbelstärke , Wirbelstraße , Teilchenabbildgeschwindigkeitsmessung
Aerodynamics of Gurney Flaps on a Wing in Ground Effect
AIAA | 2001
|FULL-LENGTH PAPERS - Aerodynamics of Gurney Flaps on a Single-Element High-Lift Wing
Online Contents | 2000
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