Improving the Aerodynamic Performance of a Wing with Winglet

Abstract

In this paper, a wing has been investigated in two cases of with and without winglet. Two types of simple and semi-circular winglet were
considered. A numerical simulation based on Control Volume Method was conducted to study the effect of utilization of a winglet on a
rectangular wing with NACA 653-218 cross sectional airfoil. The wing consists of 330 mm span and 121 mm chord length. A comparison
was made on aerodynamic features such as lift coefficient, drag coefficient, lift/drag ratio and tip vortices. It is observed that the addition of
the simple and semi-circular winglet with cant angle of 45 degree gives a greater lift coefficient and higher lift/drag ratio in comparison to
the baseline wing alone. Semi-circular winglet is the best design candidate here giving about 13.67 percent increase in lift coefficient and 8.9
percent reduction in drag coefficient at 8 degree angle of attack.