Simulation and Analysis of the Effect of Dimple on the Aerodynamic Performance of Flow Around Drone Wings

When the wing of the plane is placed in the air flow direction, due to surface effects, a boundary layer is created near its surfaces.  The boundary layer phenomenon affects Airfoil’s performance and has significant effects on the lift and drag coefficients, this phenomenon leads to restrictions that prevent the increase in wing performance. Therefore, in order to achieve optimal conditions, it is necessary to control the formed boundary layer by several techniques. In this paper, by the creation a groove perpendicular to the outstanding edge of the airfoil’s NACA0012, suction flow controlled and the airplane wing performance is investigated in two-dimensional and three-dimensional models and under attack angles and different flow rates. For this purpose, the necessary simulation was carried out using the fluent software, using the K-Kl-ω three-equation turbulence model. The width of the jet (created groove) is %2.5 of the length of the airfoil chord (%2.5C), the location of the groove is %10 of the length of the chord (from the leading edge of the airfoil) and the speed of suction is considered to be half the free speed. The results show that increasing the coefficient of lift can be achieved by creating the suction flow at the wing level and reduced the drag coefficient, which causes a delay the separation of the flow Subsequently, the angles of attack and the appropriate free flow speed rate can be selected to improve the flight of the Unmanned plan.