Part I: Uncertainty Analysis of Various Design Parameters on Winglet Performance

Masud, Jehanzeb; Toor, Zakria G.; Abbas, Zaheer; Ahsun, Umair

doi:10.2514/6.2016-0556

Cited by 2 publications

(1 citation statement)

References 1 publication

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“…Liauzun et al (2018) studied the concepts of morphing winglets which are wingtip devices with variable surfaces. Toor et al (2016) checked the effects of varying the winglet parameters on the overall winglet performance, such as dihedral, incidence and bending angle, wingspan and tapering. Using ANSYS Fluent®, Munshi et al (2018) investigated the effect of the winglet dihedral angle at different angles of attack on the ONERA M6 wing.…”

Section: Introductionmentioning

confidence: 99%

Computational numerical analysis of drag force on a standard AeroDesign wing in accordance with winglet application

et al. 2021

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This work goal is to achieve a better flight performance and to support the loading of the highest payload possible. The aerodynamics sector works to improve the aircraft aerodynamic efficiency; therefore, the aerodynamicist looks for the best solution to contribute to the aircraft efficiency by reducing drag forces. The induced drag comes from the lift force, it is related to the escape vortices which occur at the wing tips and it is the most relevant drag component. The use of structural components, as winglets, helps to reduce these vortices and the total aircraft drag. In the context of the SAE Brazil AeroDesign competition, the use of these components can support the project requirements due to the regulatory restrictions. The methodology employed was a simulation using the ANSYS CFX® software for wings modeled with different winglet configurations and the same boundary conditions to verify the best application for the studied wing. The winglet dihedral angle was set at 45°, the strings were maintained and the winglet height was used as a parameter. In the simulations, the wing attack angle was varied to obtain the variation of the drag force. With the obtained results, it was possible to verify that the wings lift forces with h=10% of the half-span winglet have lower values of drag force and present higher values of lift force, for all the analyzed angles, with a variation of up to 6 N of lift force, regarding to the wing without winglet. It is concluded the possibility to observe an improvement in the performance of the wing with the application of the winglet, in the above-mentioned context, and the compensation of a higher efficiency can help competition teams to carry more load on the aircraft due to the lift increase, and to assist the aircraft takeoff and landing handling.

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Section: Introductionmentioning

confidence: 99%

Computational numerical analysis of drag force on a standard AeroDesign wing in accordance with winglet application

et al. 2021

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Aerodynamic performance of semi-wing with multiple winglets operating at low- and medium-range Reynolds numbers

Sethunathan,

Ramasamy,

Sivasubramaniyam

et al. 2024

Int. J. Mod. Phys. C

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Birds have traits that can induce better aerodynamic efficiency along with high manoeuvring capability during its flight, which could be shared with unmanned aerial vehicles for improving their aerodynamic performances. One such feature of the wing tip, i.e. the primary feathers of the birds could be an effective geometrical feature to reduce the wing tip vortices. This paper presents the bio-inspired wing tip devices, i.e. three-and four-tipped multiple winglets in reducing the strength of vortices emanating from the wing tip of the wing operating in the Reynolds number (Re) of [Formula: see text] and [Formula: see text]. Different combinations of both three- and four-tipped multiple winglets have been designed by varying the cant angle of each tip. Numerical simulations were carried out using Ansys-Fluent by solving three-dimensional Reynolds averaged Navier–Stokes formulations coupled with k-[Formula: see text] turbulence model to resolve the features of tip vortices. The simulation clearly indicates that there is a strong correlation between the size of the vortices and the aerodynamic performance parameters such as [Formula: see text], [Formula: see text] [Formula: see text], [Formula: see text]. The three- and four-tipped multiple winglets are effective in reducing vortex drag by disintegrating large strength vortex which occurs in the tip of straight wing, into few numbers of small strength vortices. When compared to straight wing, three-tipped multiple winglet with the cant angle combination of 50, 30, 10 improves the aerodynamic efficiency by 22% to 23% and the four-tipped winglet with the cant angle combination of 60, 50, 40, 30 enhances the same by 21% to 22% in the Re of [Formula: see text]. Even the longitudinal static stability has seen considerable improvement for four-tipped multiple winglets than three-tipped multiple winglets and straight wing.

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Part I: Uncertainty Analysis of Various Design Parameters on Winglet Performance

Cited by 2 publications

References 1 publication

Computational numerical analysis of drag force on a standard AeroDesign wing in accordance with winglet application

Computational numerical analysis of drag force on a standard AeroDesign wing in accordance with winglet application

Aerodynamic performance of semi-wing with multiple winglets operating at low- and medium-range Reynolds numbers

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