| Abstrakt: |
The winglet is one of the best ways to reduce fuel consumption due to minimizing the drag generated at the wingtip. This study aims to determine the optimal winglet orientation and the influence of winglet Toe and Twist angle combination upon the aerodynamics performances of an airplane wing for Boeing 737 wings at Mach 0.78 in terms of lift-to-drag ratio. First, a sixty winglet models were drawn using SOLIDWORKS software, with various Toe angles (+10°, +5°, 0°, -5°, and -10°) and Twisted angles (-5°, 0°, and +5°) at (4) attack angles (0°, 3°, 6°, and 9°), with assumptions of the winglet Cant angle of 60°. A winglet span of 3.5 m was examined. Second, using analysis of systems Fluent, a computational fluid dynamics analysis of the wing-winglet arrangement based on the Boeing 737 airfoil on drag reduction at different attack angles was done. This analysis indicated that modifying the arrangement of the winglet's Toe and Twist angles can increase the aerodynamic performance at various attack angles. The lift to drag ratio value was calculated to decide which wing possesses the best aerodynamic characteristics. The best value of lift to drag ratio is equal to 18.67 at twist angle +5°, toe angle -5°, and AOA 3°. The lowest value of lift to drag ratio is equal to 5.23 at twist angle 0°, toe angle -10°, and AOA 0o, the percentage difference between the two model values equal 113%. [ABSTRACT FROM AUTHOR] |
