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Analysis of forced response in a wind tunnel based on Double-Lattice method

Schmidt, Hauke and Neumann, Jens and Mai, Holger (2011) Analysis of forced response in a wind tunnel based on Double-Lattice method. In: Proceedings "DLRK 2011". Deutscher Luft- und Raumfahrtkongress 2011, 27.-29. Sept. 2011, Bremen, Deutschland.

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A wind tunnel experiment for the validation of gust response computations has been performed. The model consists of an active two-dimensional rigid front wing acting as a gust generator and forcing an elastic backswept rear wing. Results of numerical simulations with gust generation are presented. For the setup of the experiment, a simulation environment was established to identify the effect of different installation positions by parameter variation and to point out the efficiency of gust generation in the wind tunnel. The aerodynamic forces are computed by a subsonic Doublet-Lattice method (DLM) which provides considerable computational efficiency and flexibility of the numerical approach. DLM is used as a standard unsteady aerodynamic tool for gust problems and enables comparisons with CFD results. A large number of numerical results in frequency and time domain are used to obtain the forced motion of the elastic back-swept wing located downstream of the gust generator and to simulate the aerodynamic interaction in the wind tunnel. This enables a survey of gust loads on the back-swept wing in comparison to gust and turbulence loads calculated according to airworthiness standards. Furthermore, the numerical results are compared to the experimental results measured in the Transonic Wind tunnel Göttingen of the German-Dutch Wind Tunnels.

Item URL in elib:https://elib.dlr.de/72812/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Analysis of forced response in a wind tunnel based on Double-Lattice method
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmidt, Haukehauke.schmidt (at) dlr.deUNSPECIFIED
Neumann, Jensjens.neumann (at) dlr.deUNSPECIFIED
Mai, Holgerholger.mai (at) dlr.deUNSPECIFIED
Journal or Publication Title:Proceedings "DLRK 2011"
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Doublet-Lattice method, wind tunnel, forced response
Event Title:Deutscher Luft- und Raumfahrtkongress 2011
Event Location:Bremen, Deutschland
Event Type:national Conference
Event Dates:27.-29. Sept. 2011
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:15 Dec 2011 13:24
Last Modified:21 Dec 2011 09:58

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