International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 05 | May 2024
p-ISSN: 2395-0072
www.irjet.net
Numerical Analysis of Aerodynamic Characteristics of Aeroplane Wing with Winglets Md. Shahadat Hossan Sayem1, Md. Mainuddin Sagar2, Md. Rezwan Alam3, Dr. Abdullah AlFaruk4, 1,3Research Scholar, Department of Mechanical Engineering, Khulna University of Engineering & Technology,
Khulna, Bangladesh
2Research Scholar, Department of Mechanical Engineering, Chittagong University of Engineering & Technology,
Chittagong, Bangladesh Professor, Department of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna, Bangladesh ---------------------------------------------------------------------***--------------------------------------------------------------------4
Abstract - This effort examined the potential of winglets
leading edge, accompanied by a straight trailing edge, often with upper and lower surface curvature symmetrical. Foils constructed with water with similar function as the operating fluid are called hydrofoils. A winglet is an almost vertical extension to the tips of the wing. The winglet’s upward angle (or Cant), its inward angle (or toe), as well as its size and shape are critical for proper performance, and unique in every application.
on wings in aircraft for the reduction of induced drag coefficient and the increase of lift coefficient without increasing the span of the wings. In this study, the aerodynamic characteristics of an airfoil wing having winglets have been studied with the help of simulation software ANSYS Fluent. Here, the drag co-efficient and lift coefficient have been studied for different cant angles of winglets on aircraft wing. For the effort, subsonic flow of air will be considered over the wing. NACA 0012 symmetric airfoil is considered for the study. In this report, the preeffort for numerical analysis of the using and performance of winglets have been observed and also, the shape of the wing and winglets. From the study, it is observed that the lift to drag coefficient ratio exhibits maximum values for wing with 90° winglet. The values of CL/CD shows lowest values for normal wing. In the case of wing with 30° and 45° winglet, the values or curves seem similar with each other. Blended winglet will increase lift coefficient about approximately 42% to 49% and reduce drag coefficients. These winglet designs are capable of reducing the induced drag and converting wing tip vortices to increase thrust, saving costs by reducing fuel consumption, reducing noise levels and enhancing aircraft engine performance.
Winglets help mitigate the effects of "induced drag." Most airplanes are designed so that the outer tips of the wing are higher than where the wings are attached to the fuselage. This upward angle is called the dihedral and helps to keep the airplane from rolling unexpectedly during flight. When an aircraft is in flight, the air pressure on top of the wing is lower than the air pressure under the wing. That’s why there would be a pressure difference between the upper surface of the wing and the lower surface of the wing causing a pressure gradient region. That would result in the desired lift which would help an aircraft to float in the air considering the required consequences. A winglet is a vertical or inclined attachment of the wing tips. Winglets make it easier for the wings to generate lift, which ensures the planes need fewer input from the engines. Winglets has been used extensively as they offer better fuel efficiency for the aircraft.
Key Words: NACA, Aerofoil, Winglets, Lift Coefficient, Subsonic Flow, Reynolds Number, Chord Length
The winglet transforms some of the otherwise wasted ene rgy into an apparent thrust in the wingtip vortex. This small contribution can be worthwhile, provided the benefit offsets the cost of installing and maintaining the winglets during aircraft's lifetime. The vortex that rotates around from Mow the wing impacts the winglet's cambered surface, creating certain angles with a push. Also they can perform to reduce the strength of the wing tip vortex, which trails downstream of the plane. It is a high risk for an aircraft to pass through these vortices, the turbulent air can push the aircraft into an accident by causing loss of control.
1.INTRODUCTION Wings are the most important and vital part of an aeroplane which keeps the aircraft floated and steady and also helps it to move through a direction into the air stream of surroundings. More than 100 years ago, aircraft designers sought to improve the existing methodologies for aircraft control.. An airfoil-shaped body, called ‘Wing’ which moves through a fluid produces an aerodynamic strength. The part of this force is called raise which is perpendicular to the direction of motion. The parallel aspect to the direction of free stream motion is called drag. Subsonic flight airfoils have a typical form with a rounded
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