The Experimental and Numerical Investigation of the E361 Airfoil Equipped with the Gurney Flap and Vortex Generator

In this study the effects of the Gurney flap and the vortexgenerator on the aerodynamic characteristics of the E361airfoil has been investigated experimentally and numericallyat the Reynolds numbers of 105 and 1.5x105. The Gurneyflap with the height of 2.6% C is attached to the airfoilwindward side at the trailing edge. Then adding thecylindrical vortex generators located at 12%C to thementioned configuration, the combination of these twocontrol devices have been investigated. The height anddiameter of the vortex generators are 0.4 mm and 4 mmrespectively. The results show that the Gurney flap increasesboth the lift and drag coefficients and decreases the stall andzero-lift angles. The vortex generator increases the stallangle due to delaying the separation. Therefore the dragcoefficients are reduced at high angles of attack.