International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 11 | Nov 2024
p-ISSN: 2395-0072
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CFD simulation over a Hook Winglet configuration Harish M1, Yaswanth Sai Kumar A 2, Hemavathi G 3 1 Assistant Professor, Department of Aeronautical Engineering, Hindusthan Institute of Technology 2UG Student, Department of Aeronautical Engineering , Hindusthan Institute of Technology
3 UG Student, Department of Aeronautical Engineering , Hindusthan Institute of Technology
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Abstract - The importance of winglet design in
Due to the overall acknowledgement of world warming, the aviation enterprise, along with many other transport industries are confronted with increasingly stricter emission regulations from government agencies around the arena to lessen the carbon footprints of future aircraft. Consequently, in today’s world of aviation, winglets are typically meant to increase the overall aerodynamic efficiency of aircrafts. They reduce the vortices generated along the surface of the wing via lowering the pressure gradient at the tip of the wing, hence equalizing the pressure difference between the upper and lower surface of the wing and minimizing the magnitude of the vortices generated at some point of flight. This translates to reduced drag and higher average gasoline economic system without requiring any drastic changes of an aircraft’s structure elsewhere. However, various designs may also provide different grades of performance depending on the physical dimensions, wing form and flight characteristics of the aircraft.
aerodynamic engineering, particularly in addressing the challenge of drag reduction and enhancing aircraft performance has been highlighted. Through the utilization of CATIA-V5 for design and ANSYS for simulation, various winglet configurations were analyzed, revealing distinct efficiencies. The findings emphasize the critical role of winglets in improving fuel efficiency, minimizing drag, and prolonging engine life, with the hook-shaped winglet demonstrating the highest effectiveness. This research underscores the significance of selecting optimal winglet designs to maximize aerodynamic performance and operational efficacy in the aviation industry. Key Words: Winglet, Computational Fluid Dynamics, Hook, Wingtip vortex, Aircraft, Induced drag etc.
1.INTRODUCTION
The idea of attaching wingtip devices to the wing dates to the end of the 20th century. Several experiments and studies were completed with few fixed-wing aircrafts, but it become no longer until the 1970s during the oil crisis that the idea got re-enlightened and commercialized among aircraft manufactures and aviation agencies.
A winglet is a device used to enhance the performance of aircraft via lowering the lift induced drag as a result of wingtip vortices. It is a vertical or angled extension at the recommendations of each wing. Winglets improve efficiency with the aid of diffusing the shed wingtip vortex, which in flip reduces the drag due to lift and improves the wing’s lift over drag ratio. Winglets increase the effective aspect ratio of a wing without adding significantly to the structural stress and subsequently important weight of its structure.
Winglets, along with other wingtip devices can be considered a mainstream element among subsonic and transonic contemporary aircrafts. They are seen in various aircraft sizes, ranging from small sized piston props to large jet propelled transonic and supersonic jets.
Winglets boom a plane's operating efficiency with the aid of lowering what is called induced drag at the tips of the wings. An airplane's wing is formed to generate negative pressure on the upper surface and positive pressure on the lower surface as the aircraft moves forward. This unequal pressure creates lift across the upper surface and the plane can go away the ground and fly.
2. CONFIGURATION DETAILS In this paper B737A, B737C and B737D are the airfoils chosen for root section, mid span and tip, as it is ideally suited to any environment where speed is important. They are shown in figure 1, 2 and 3 below.
Winglets, which are airfoils operating much like a sailboat tacking upwind, produce a forward thrust inside the circulation field of the vortices and decrease their strength. Weaker vortices suggest less drag at the wingtips and lift is restored. Improved wing efficiency translates to greater payloads, reduced fuel consumption, and an extended cruising range which can allow an air carrier to enlarge routes and locations. Fig -1: B737A Root Airfoil
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