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Aerodynamic Analysis with Athena Vortex Lattice (AVL)

Kinga Budziak

Abstract
This project evaluates the suitability and practicality of the program Athena Vortex Lattice (AVL) by Mark Drela. A short user guide was written to make it easier (especially for students) to get started with the program AVL. AVL was applied to calculate the induced drag and the Oswald factor. In a first task, AVL was used to calculate simple wings of different aspect ratio A and taper ratio lambda. The Oswald factor was calculated as a function f(lambda) in the same way as shown by HOERNER. Compared to HOERNER's function, the error never exceed 7.5%. Surprisingly, the function f(lambda) was not independent of aspect ratio, as could be assumed from HOERNER. Variations of f(lambda) with aspect ratio were studied and general results found. In a second task, the box wing was investigated. Box wings of different h/b ratio: 0.31, 0.62, and 0.93 were calculated in AVL. The induced drag and Oswald factor in all these cases was calculated. An equation, generally used in the literature, describes the box wing's Oswald factor with parameters k1, k2, k3 and k4. These parameters were found from results obtained with AVL by means of the Excel Solver. In this way the curve k = f(h/b) was plotted. The curve was compared with curves with various theories and experiments conducted prior by other students. The curve built based on AVL fits very well with the curve from HOERNER, PRANDTL and a second experiment made in the wind tunnel at HAW Hamburg.

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Date:2015-09-20
Type of work: Project
Advisor / Examiner:Dieter Scholz
Published by:Aircraft Design and Systems Group (AERO), Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences
This work is part of:transparent pin for text alignment Digital Library - Projects & Theses - Prof. Dr. Scholz --- http://library.ProfScholz.de pin
 
PERSISTENT IDENTIFIER:
URN: http://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2015-09-20.015
DOI:http://doi.org/10.15488/2551
ARK:https://n2t.net/ark:/13960/t86j2212c
Associated research data:http://doi.org/none    (none)
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Keywords, German (GND): Luftfahrt,   Luftfahrzeug,   Flugzeugaerodynamik,   Luftwiderstand
Keywords, English (LCSH): Aeronautics,   Airplanes,   Aerodynamics,   Drag (Aerodynamics)
Keywords, free: AVL, VLM, drag, induced, Oswald, factor, box wing, aircraft
DDC: 629.13,    629.1323,    629.13234,    629.1333
RVK: ZO 7230

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Any further request may be directed to:
Prof. Dr.-Ing. Dieter Scholz, MSME
E-Mail see: http://www.ProfScholz.de

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BUDZIAK, Kinga, 2015. Aerodynamic Analysis with Athena Vortex Lattice (AVL). Project. Hamburg University of Applied Sciences, Aircraft Design and Systems Group (AERO). Available from: http://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2015-09-20.015 [viewed YYYY-MM-DD].
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BUDZIAK, Kinga: Aerodynamic Analysis with Athena Vortex Lattice (AVL). Hamburg University of Applied Sciences, Aircraft Design and Systems Group (AERO), Project, 2015. - URL: http://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2015-09-20.015 (YYYY-MM-DD)

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LAST UPDATE:  08 March 2019
AUTHOR:  Prof. Dr. Scholz
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