Airfoil Lift Augmentation at Low Reynolds Number

摘要

A low-speed wind-tunnel investigation was undertaken to explore the behavior of trailing-edge ow effectors onnthe performance of a S8036 airfoil. Gurney flaps, as well as conventional trailing-edge flaps, were explored atnRe u0001 40; 000, 60,000, and 80,000. The effects ofGurney flap length, as well as trailing-edge flap length and deflectionnangle, were studied. Performance characterization encompassed force balance and pressure measurements.nExamination of the results showed that both types of flaps are capable of significantly increasing not only thenmaximum lift coefficient, but also the range and endurance parameters. For the geometries explored, both thenGurney and trailing-edge flap showed similar levels of lift augmentation; however, the trailing-edge flaps generallynshowed larger relative increments in the lift-to-drag ratio and endurance parameter than the Gurney flaps.