Journal of Aeroelasticity and Structural Dynamics, Vol 3, No 3 (2015)

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Aeroelastic Prediction of Discrete Gust Loads Using Nonlinear and Time-Linearized CFD-Methods

Mark Förster, Christian Breitsamter

Abstract


The time-linearized finite volume Navier-Stokes solver AER-SDNS is augmented by a discrete gust model.
With AER-SDNS, complex Generalized Aerodynamic Forces (GAFs) are computed very efficiently in the frequency domain, while preserving the full
Computational Fluid Dynamics (CFD) quality of the results.
Finally, various aeroelastic gust responses are determined by solving a linear state space model.
The results are compared to gust responses by means of an artificial velocity gust model and a strongly coupled, time domain, aeroelastic
method.
As test case, the small aspect ratio, swept AGARD 445.6 wing is deployed.
Additionally, a stability analysis is conducted in order to validate both methods with experimental data.

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ISSN 1974-5117