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Benchmarking the prediction of dynamic derivatives: Wind tunnel tests, validation, acceleration methods
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2010 (English)In: AIAA Atmospheric Flight Mechanics Conference 2010, 2010Conference paper (Refereed)
Abstract [en]

The dynamic derivatives are widely used in linear aerodynamic models which are considered to determine the flying qualities of an aircraft: The ability to predict them reliably, quickly and sufficiently early in the design process is more and more important. This paper describes some experimental and computational activities dealing with the determination of dynamic derivatives. The work has been carried out within the FP6 European project SimSAC. Numerical and experimental results are compared for two aircraft configurations: The generic civil transport aircraft, wing-fuselage-tail configuration DLR-F12 and a generic Transonic CRuiser (TCR), which is a canard configuration. Static and dynamic wind tunnel tests have been carried out for both configurations and are briefly described. The data base generated for the TCR configuration includes small amplitude oscillations, dedicated to the determination of dynamic derivatives, and large amplitude oscillations, in order to investigate the dynamic effects on nonlinear aerodynamic characteristics. The influence of the canard has been investigated. Dynamic derivatives have been determined on both configurations with a large panel of tools, from linear aerodynamic (Vortex Lattice Methods) to CFD (unsteady Reynolds-Averaged Navier-Stokes solvers). Strong limitations of linear aerodynamic tools are observed for the canard configuration. A specific attention is paid to acceleration techniques in CFD methods, which allow the computational time to be dramatically reduced while keeping a satisfactory accuracy.

Place, publisher, year, edition, pages
Keyword [en]
Aircraft configurations, Dynamic wind tunnel tests, Large amplitude oscillation, Linear aerodynamic model, Non-linear aerodynamics, Small-amplitude oscillations, Unsteady reynolds-averaged navier-stokes, Wing-fuselage-tail configuration, Aircraft models, Computational fluid dynamics, Dynamics, Flight dynamics, Fuselages, Tools, Transport aircraft, Wind stress, Aerodynamic configurations
National Category
Vehicle Engineering
URN: urn:nbn:se:kth:diva-148867ScopusID: 2-s2.0-84880915129ISBN: 978-162410151-9OAI: diva2:738111
AIAA Atmospheric Flight Mechanics Conference 2010, 2 August 2010 through 5 August 2010, Toronto, ON, Canada

QC 20140815

Available from: 2014-08-15 Created: 2014-08-14 Last updated: 2014-08-15Bibliographically approved

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Zhang, Mengmeng
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Aeronautical and Vehicle Engineering
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