Abstract :
The conventional wing of PUNA Cargo is designed without a winglet
structure. This causes its operation to have a large induced drag in the form of air
vortices made by the movement of air flow from an area of high pressure (lower
wing) to an area of low pressure (upper wing) collected at the tip of the wing(wing
tip)
In the interest of increasing the flying ability of PUNA cargo, this study
examined the effect of adding a whitcomb winglet structure to the aerodynamic
performance of the PUNA cargo wing using the Computational Fluid Dynamics
(CFD) method. In addition, the analysis in this study was carried out on each
variation of the simulated angle of attack, so that it can be seen how the
aerodynamic performance value of the cargo wing of PUNA without and with the
winglet structure in each variation of the simulation angle of attack.
After the CFD simulation was performed, the aerodynamic performance
values of the cargo wing of PUNA without additional winglet structure were 4,46
for AoA 0°; 22,61 for AoA 6°; 14,19 for AoA 12°; and 14,48 for AoA 18°;
Meanwhile, the aerodynamic performance values of the cargo wing of PUNA with
the addition of awinglet structure were 4.83 for AoA 0°; 21.56 for AoA 6°; 13,49
for AoA 12°; and 6.11for AoA 18°. Based on these results, the aerodynamic
performance of the cargo wing of PUNA tends to be better if it is not equipped
with a winglet structure.