Numerical Study of Aerodynamic Analysis on Wing Airfoil NACA 43018 with the addition of Forward and Rearward Wingtip Fence

摘要

Winglet is one accessory on airplane wings that can be used to improve wing performance without widen wingspan wings (wingspan of the aircraft). Winglet serves to dampen the vortex flow at the wing tips that caused by the interaction airflow from upper and lower sides of the wing. [1]. This research was conducted numerical by using simulation model of turbulence k-s realizable. Freestream velocity is 40 m/s (Re= 5 x 106) with wing angle of attacks (a) =0o, 2 o, 4 o, 6 o, 8 o, 10 o,12 o, 15 o and 19 o. The Model is NACA airfoil 43018 with and without winglets. Two types wing are used: wingtip fence with forward and rearward. The results show the addition of winglets minimize vorticity magnitude behind the wing. Besides the addition of winglets can improve the aerodynamic performance of the wing with an increase in CL/ CD a maximum of 22.9% on a wingtip fence forward and rearward 17.05% on a wingtip fence on the angle of attack 2o. The pressure distribution on lower surface of the wing increase and distributed more evenly compared to that on the plain wing.