Abstract :
An airplane wing is the main component of an airplane, and has the function of
producing lift or lifting force on the airplane. On the aircraft wing there is a primary
flight control surface, and a secondary flight control surface which functions as the
aircraft's steering area. The leading edge is located at the front of the wing (upper
surface), while the trailing edge is located at the back of the wing (lower surface). In
writing and researching this thesis report, we carried out numerical simulations. This
research uses angles of attack -10°, 0°, 10°, 15°, 20°, 30°. The simulation was carried
out during cruising flight at a speed of 30 m/s above sea level. Aerodynamic simulation
on the NACA 4412 airfoil model without and using serration on the leading edge and
trailing edge and knowing the effect of serration on the NACA 4412 airfoil model on
the leading edge and trailing edge on aerodynamic characteristics using ANSYS CFX
software. Meanwhile, in carrying out calculations or data processing for the lift
coefficient (Cl) and drag coefficient (Cd) values for each modified NACA 4412 airfoil
model, where the ? value is equal to 1.225 N, and the S value is 8.404 m² for non
serrated while leading edge and trailing edge serrated 7,478 m². It was found that
serrated on the leading edge can increase quite a lot of lift and drag, in contrast to the
serrated trailing edge which can increase lift but not significantly increase drag.