Particle Tracking Velocimetry was used, in a low-speed wind-tunnel study, to obtain simultaneous cross-flow velocity measurements in three planar regions downstream of an airfoil having a NACA 0015 profile. In order to measure both the total lift and induced drag, and their distributions on the airfoil, a wake integration technique based on the control volume approach was used. The airfoil model was tested in clean wing configuration and with a 3.33 % Gurney flap attached to the trailing edge. The Gurney flap was found to increase the complexity of the wake and cause a systematic increase in lift and induced drag values. The changes in total lift and induced drag resulting from the fitting of a Gurney flap compared very favourably to investigations using traditional aerodynamic techniques demonstrating the validity of the method.
Optical-velocimetry, wake measurements of lift and induced drag on a wing
Optische Geschwindigkeitsmessung, Spurmessungen für den Auftrieb und induzierte Turbulenzen an einem Tragflügel
Optics and Lasers in Engineering ; 44 , 3/4 ; 282-303
2006
22 Seiten, 19 Bilder, 6 Tabellen, 26 Quellen
Article (Journal)
English
Induced Drag of a Simple Wing From Wake Measurements
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