AERODYNAMIC AND AEROACOUSTIC NUMERICAL INVESTIGATION SINGLE-ELEMENT WING SLOTTED FLAP ON WING AIRFOIL NACA 43018

Aerodynamic performance and noise are very important in aircraft operations. These two are often separated but are very much related to each other. The tendency for noise to occur is more likely when there are additional components on the wing. This study uses numerical simulation on a wing with NACA 43018 airfoil equipped with a slotted flap. Numerical simulation using Ansys Fluent 19.1. using twelve angles of attack. The turbulent model used is K-ε Realizable at a freestream velocity of 120 m/s. Aerodynamic performance, skin friction magnitude, vorticity magnitude, and Reynolds number contours were observed. This study shows that there is a relationship between aerodynamic performance, especially induced drag coefficient, and noise generated using slotted flaps. The addition of a slotted flap produces the highest aerodynamic performance at δf = 0^o. In addition, the noise was observed at slotted flap configurations with δf = 15^o and 30^o where the visualization of Reynolds number contours showed significant differences at the wingtip area. Visualization of vorticity magnitude shows that larger flap deflection will result in a larger induced drag coefficient.