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Software Testing: VSPAERO

Floris Mariën

Abstract
Purpose – Test the aerodynamic analysis code VSPAERO, which is part of OpenVSP from NASA. Apply VSPAERO to calculate the lift curve slope and the span efficiency factor of straight wings (for various aspect and taper ratios) as well as the induced drag of box wings (for various h/b-ratios) relative to their reference wing. --- Methodology – VSPAERO results are compared with results from analytical equations, wind tunnel measurements, and results produced with other aerodynamic codes. --- Findings – VSPAERO offers correct and reliable results, if the simulation is set up with care. The user must always keep an eye on model discretization and refinement, flow conditions, and number of iterations. The Vortex Lattice Method (VLM) and the panel method are best used for different purposes. The VLM shows shorter simulation time and produces reliable results. The panel method is more complicated to use. Numerical results are also good. In addition, the panel method can be used better to visualize flow phenomena. Hoerner's simple approach to induced drag estimation can be used to approximate results of the VLM and the panel method, if a simple correction factor is applied. --- Research Limitations – Most of the tests of VSPAERO have been done with a simple wing geometry, as such much simpler than a full aircraft geometry. --- Practical Implications – VSPAERO can be used with relative ease. It can also be used to show flow phenomena on full aircraft geometry. --- Originality – Repeating simple calculations done many times before does not sound original, but doing this with the relatively new software VSPAERO offering the VLM as well as the panel method seems to be original after all.

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Date:2021-07-16
Type of work: Master Thesis
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: https://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2021-07-16.018 (to reach this page)
DOI:https://doi.org/10.15488/11559
ARK:https://n2t.net/ark:/13960/s2n4m3b259f
Associated research data:https://doi.org/10.7910/DVN/0S1R14    (Program)
URLs registered with URN: Show all links associated with this text!
 
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Keywords, German (GND): Luftfahrt,   Luftfahrzeug,   Flugzeugaerodynamik,   Luftwiderstand
Keywords, English (LCSH): Aeronautics,   Airplanes,   Aerodynamics,   Computational fluid dynamics
Keywords, free: Flugzeug, Numerische Strömungssimulation, CFD, Panelverfahren, Tabellenkalkulation, Wirbelgitterverfahren, Drag (Aerodynamics), Flow visualization, Electronic spreadsheets, 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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For test purposes DOI included here for: Scholz, D.; Michaelis, S.; Loraine, T. (Eds.): 2021 International Aircraft Cabin Air Conference: Conference Proceedings.

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ISO 690:
MARIEN, Floris, 2021. Software Testing: VSPAERO. Master Thesis. Hamburg University of Applied Sciences, Aircraft Design and Systems Group (AERO). Available from: https://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2021-07-16.018 [viewed YYYY-MM-DD].

Major results / graphical abstract:
Ecolabel

Above: The "theoretical" curve f (λ, A) is given in Hoerner 1965. It is used to calculate induced drag. This is quite close to what VSPAERO with its VLM solver calculated for large aspect ratios, A.

A320 Panel Method

Above: The Airbus A320 (without engines) modeled with the panel method from VSPAERO.

Front page:
Cover Page

LAST UPDATE:  14 May 2022
AUTHOR:  Prof. Dr. Scholz
IMPRESSUM (PDF)

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