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Aeroelastic Gust Load Prediction based on Time-Linearized RANS Solutions

Kaiser, Christoph and Friedewald, Diliana and Quero-Martin, David and Nitzsche, Jens (2016) Aeroelastic Gust Load Prediction based on Time-Linearized RANS Solutions. Deutscher Luft- und Raumfahrtkongress, 13.-15. Sept. 2016, Braunschweig.

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Official URL: http://publikationen.dglr.de/?tx_dglrpublications_pi1[document_id]=420161

Abstract

In this paper the multi-disciplinary simulation of unsteady flight maneuvers with a reduced-order model (ROM) based on time-linearized RANS solutions is demonstrated for the analysis of gust encounter of the XRF1 transport aircraft configuration at transonic speed. The numerical prediction of gust loads requires the coupling of the disciplines aerodynamics, structural dynamics and flight mechanics. The aeroelastic coupling is realised in the frequency domain in terms of generalized coordinates and forces employing a fluid-structure feedback loop. The Linear Frequency Domain (LFD) solver of the DLR TAU code is used to construct the linearized aerodynamic reduced-order model. The LFD solver offers a significant reduction in computational effort for small-perturbation problems while completely retaining the fidelity of the Reynolds-averaged Navier-Stokes (RANS) flow solutions. For validation, both the aerodynamic and aeroelastic response due to a 1-cos gust encounter are compared to aerodynamically nonlinear time domain simulations. The coupled aeroelastic model accounts for rigid-body and elastic motion of the aircraft in form of mode shapes for the heave and pitch motion as well as the first elastic wing bending mode.

Item URL in elib:https://elib.dlr.de/107542/
Document Type:Conference or Workshop Item (Speech)
Title:Aeroelastic Gust Load Prediction based on Time-Linearized RANS Solutions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kaiser, ChristophChristoph.Kaiser (at) dlr.dehttps://orcid.org/0000-0001-9156-8352
Friedewald, DilianaDiliana.Friedewald (at) dlr.dehttps://orcid.org/0000-0002-5591-2459
Quero-Martin, DavidDavid.QueroMartin (at) dlr.deUNSPECIFIED
Nitzsche, JensJens.Nitzsche (at) dlr.deUNSPECIFIED
Date:7 October 2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:LFD, gust, loads, unsteady, TAU, aerodynamics, linear
Event Title:Deutscher Luft- und Raumfahrtkongress
Event Location:Braunschweig
Event Type:national Conference
Event Dates:13.-15. Sept. 2016
Organizer:Deutsche Gesellschaft für Luft- und Raumfahrt 2016
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 - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: Kaiser, Christoph
Deposited On:09 Dec 2016 08:26
Last Modified:09 Dec 2016 08:26

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