Aerodynamic Analysis on Winglets

BMEDME613 Aerodymamics
Assignment

Aerodynamic Analysis on Winglet

By: V.Devanandh, 114009037, B.Tech-Mechanical Engineering(III year), SASTRA University. Prof.Dhananjay, SASTRA University. Submitted to:

April 12, 2013

Contents
1 Introduction 2 Scope of the Assignment 3 Review of Basic concepts 3.1 3.2 Wingtip vortices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Induced drag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 3 3 4 5 6 7 8

4 Modeling and Analysis of NACA 2412 airfoil 4.1 4.2 Scenario 1: Airfoil without Winglet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Scenario 2: Airfoil with winglet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Conclusion

1

List of Figures
1 2 3 4 5 6 7 Regions of upwash and downwash created by trailing vortices . . . . . . . . . . . . . . . . AOA Effect on induced drag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NACA 2412 Airfoil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Airfoil without Winglet Flow Analysis - Top View . . . . . . . . . . . . . . . . . . . . . . Airfoil without Winglet Flow Analysis - Rear View . . . . . . . . . . . . . . . . . . . . . . Airfoil with Winglet Flow Analysis - Top View . . . . . . . . . . . . . . . . . . . . . . . . Airfoil with Winglet Flow Analysis - Rear View . . . . . . . . . . . . . . . . . . . . . . . . 4 5 5 6 7 7 8

2

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Introduction

In commercial aircraft industry, fuel efficiency plays a major role in the current scenario wherein fuel resources are depleting rapidly. Induced drag is an important phenomenon in determining the fuel efficiency of an aircraft. The less induced drag is, the more fuel efficient the aircraft is. Winglet-an extension at the wing tip, also called as wingtip devices is one of the proven methods of reducing induced drag at wingtips. Winglets effectively

References: [1] Jean-Jacques Chattot, Analysis and design of wings and wing/winglet combinations at low speeds. Computational Fluid Dynamics JOURNAL, October 2004, Special Issue - Physical and Mathematical Foundations of CFD. [2] M. A Azlin, C.F Mat Taib, S. Kasolang and F.H Muhammad, CFD Analysis of Winglets at Low Subsonic Flow . Proceedings of the World Congress on Engineering 2011 Vol I WCE 2011, July 6 - 8, 8 2011, London, U.K. [3] Gianluca Minnella 1737720, Yuniesky Rodriguez 2086370, Jose Ugas 1603084, Project Report - Aerodynamic Shape Design Optimization of Winglets . Florida International University. 9