Aerodynamic Analysis with Athena Vortex Lattice (AVL)

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Budziak, Kinga: Aerodynamic Analysis with Athena Vortex Lattice (AVL). Hamburg : Aircraft Design and Systems Group (AERO), Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences, 2015. 72 S.

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/2551

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Sum total of downloads: 538




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This project evaluates the sutability and practicality of the program Athena Vortex Lattice (AVL) by Mark Drela. A short user guide was written to make it easier (especially for stu-dents) 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 ploted. 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.
License of this version: CC BY-NC-SA 4.0
Document Type: book
Publishing status: publishedVersion
Issue Date: 2015
Appears in Collections:Fakultät für Maschinenbau

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pos. country downloads
total perc.
1 image of flag of Germany Germany 157 29.18%
2 image of flag of China China 58 10.78%
3 image of flag of United Kingdom United Kingdom 37 6.88%
4 image of flag of India India 34 6.32%
5 image of flag of Brazil Brazil 31 5.76%
6 image of flag of United States United States 23 4.28%
7 image of flag of Italy Italy 23 4.28%
8 image of flag of France France 18 3.35%
9 image of flag of Turkey Turkey 16 2.97%
10 image of flag of Netherlands Netherlands 16 2.97%
    other countries 125 23.23%

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