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Efficient Prediction of Aerodynamic Control Surface Responses Using the Linear Frequency Domain

Seidler, Ruben Bernhard and Marten, Sebastian and Widhalm, Markus and Wild, Jochen (2020) Efficient Prediction of Aerodynamic Control Surface Responses Using the Linear Frequency Domain. AIAA Journal, 58 (5). American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.J058840. ISSN 0001-1452.

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Official URL: http://www.arc.aiaa.org


In modern aircraft design the accurate prediction of dynamic control surface deflections is crucial for the evaluation and application of new load alleviation techniques. Time-marching approaches, such as the unsteady Reynolds-averaged Navier–Stokes equations, do provide a complete modeling of the aerodynamic flowfield; however, they are extremely time-consuming and still too expensive for design applications. In this paper a model is presented, which enables the fast and accurate prediction of aerodynamic responses for arbitrary control surface deflections. The model hereby reflects the time signal of the control surface deflection as a superposition of frequency components and computes the dynamic response behavior of the control surface using the linear frequency domain. The frequency responses are precomputed in a surrogate model for a wide parameter space of Mach number, Reynolds number, angle of attack and flap chord ratio, so that a frequency response for a new flight condition can be computed by mere interpolation. After building the surrogate model, the method achieves reduction in computational time of up to six orders of magnitude in comparison to time-marching simulations, while still covering the viscous and unsteady aerodynamic effects in the flow.

Item URL in elib:https://elib.dlr.de/138213/
Document Type:Article
Title:Efficient Prediction of Aerodynamic Control Surface Responses Using the Linear Frequency Domain
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Seidler, Ruben BernhardRuben.Seidler (at) dlr.deUNSPECIFIED
Marten, SebastianSebastian.Marten (at) dlr.deUNSPECIFIED
Widhalm, MarkusMarkus.Widhalm (at) dlr.deUNSPECIFIED
Wild, JochenJochen.Wild (at) dlr.dehttps://orcid.org/0000-0002-2303-3214
Date:28 February 2020
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.J058840
EditorsEmailEditor's ORCID iD
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:Unsteady aerodynamics, Control surfaces, Aerodynamic response behavior, Linear Frequency Domain, Surrogate model, Efficient simulation, unsteady RANS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old), L - Simulation and Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology
Institute for Aerodynamics and Flow Technology > Transport Aircraft
Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Seidler, Ruben Bernhard
Deposited On:26 Nov 2020 07:34
Last Modified:01 Jun 2021 03:00

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