Aerodynamic Analysis with Athena Vortex Lattice (AVL)

 dc.identifier.uri http://dx.doi.org/10.15488/2551 dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2577 dc.contributor.advisor Scholz, Dieter dc.contributor.author Budziak, Kinga ger dc.date.accessioned 2017-12-14T15:55:32Z dc.date.available 2017-12-14T15:55:32Z dc.date.issued 2015 dc.identifier.citation 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. dc.description.abstract 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. ger dc.language.iso eng ger dc.publisher Hamburg : Aircraft Design and Systems Group (AERO), Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences dc.rights CC BY-NC-SA 4.0 ger dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/4.0/ ger dc.subject AVL eng dc.subject VLM eng dc.subject drag eng dc.subject induced drag eng dc.subject Oswald factor eng dc.subject box wing eng dc.subject aircraft eng dc.subject Widerstand ger dc.subject induzierter Widerstand ger dc.subject Oswald Faktor ger dc.subject Flugzeug ger dc.subject.classification Luftfahrzeug ger dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger dc.subject.ddc 629,1 | Luft- und Raumfahrttechnik ger dc.title Aerodynamic Analysis with Athena Vortex Lattice (AVL) ger dc.type book ger dc.type Text ger dc.relation.urn http://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2015-09-20.015 dc.relation.other https://n2t.net/ark:/13960/t86j2212c dc.description.version publishedVersion ger tib.accessRights frei zug�nglich ger
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