Abstract
A low-speed wind-tunnel investigation was undertaken to explore the behavior of trailing-edge flow effectors on the performance of a S8036 airfoil. Gurney flaps, as well as conventional trailing-edge flaps, were explored at Re = 40, 000,60,000, and 80,000. The effects of Gurney flap length, as well as trailing-edge flap length and deflection angle, were studied. Performance characterization encompassed force balance and pressure measurements. Examination of the results showed that both types of flaps are capable of significantly increasing not only the maximum lift coefficient, but also the range and endurance parameters. For the geometries explored, both the Gurney and trailing-edge flap showed similar levels of lift augmentation; however, the trailing-edge flaps generally showed larger relative increments in the lift-to-drag ratio and endurance parameter than the Gurney flaps.
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