Experimental Investigations on Aerodynamics Parameters of Combined Tubercles with Vortex Generator on NACA 0015 Wing Airfoils

The basic airfoil is made to enhance its post-stall performance at stall conditions compared to pre-stall conditions. Thus, the focus of this study is to combine vortex generators and leading-edge tubes to increase the airfoil’s L/D ratio in the post-stall phase. The tubercles like (Spherical Leading-edge Tubercles) SLET and (Triangular vortex generator) TVG were chosen for this study based on the performance reported in earlier research. The wing model with SLET and TVG combination pair are investigated experimentally for varied angle of attack from 0° to 24°. The modified combination in wing improved the coefficient of lift for various angles of attack and in the post stall conditions. This is due to TLE and VG’s streamwise vortices that occurs and stagnate around the surface for a longer period, thereby delaying flow separation and lowering pressure drag nearer to the wing models trailing edge.