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Time-Linearized Analysis of Motion-Induced and Gust-Induced Airloads with the DLR TAU Code

Kaiser, Christoph and Thormann, Reik and Dimitrov, Diliana and Nitzsche, Jens (2015) Time-Linearized Analysis of Motion-Induced and Gust-Induced Airloads with the DLR TAU Code. Deutscher Luft- und Raumfahrtkongress 2015, 22.-24. September 2015, Rostock, Deutschland.

Full text not available from this repository.

Official URL: http://publikationen.dglr.de/?tx_dglrpublications_pi1[document_id]=370189

Abstract

This paper provides an overview about the time-linearized analysis of motion-induced and gust-induced airloads with the DLR flow solver TAU. Time-linearized CFD methods to compute an aircraft’s aerodynamic response to sinusoidal oscillations promise a reduced computational effort while retaining the fidelity of the RANS flow characteristics. Two approaches are presented: a system identification method which excites the nonlinear steady background flow state with a broad-band pulse signal of small amplitude resulting in the aerodynamic frequency response function, and the DLR TAU linear frequency domain (LFD) solver which solves the linearized and Fourier transformed unsteady RANS equations for the first harmonic of the aerodynamic response. Both methods are validated with forced-motion pitching oscillations of the 2-d NACA 64A010 airfoil in comparison to the response of the fully nonlinear solver. Furthermore, the pulse method and LFD method are extended for sinusoidal gust encounters.

Item URL in elib:https://elib.dlr.de/101278/
Document Type:Conference or Workshop Item (Speech)
Title:Time-Linearized Analysis of Motion-Induced and Gust-Induced Airloads with the DLR TAU Code
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kaiser, Christophchristoph.kaiser (at) dlr.deUNSPECIFIED
Thormann, ReikUNSPECIFIEDUNSPECIFIED
Dimitrov, Dilianadiliana.dimitrov (at) dlr.deUNSPECIFIED
Nitzsche, Jensjens.nitzsche (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:LFD, Motion, Gust, Loads, Unsteady, TAU, Aerodynamics, Linear
Event Title:Deutscher Luft- und Raumfahrtkongress 2015
Event Location:Rostock, Deutschland
Event Type:national Conference
Event Dates:22.-24. September 2015
Organizer:Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V. (DGLR)
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
Deposited By: Kaiser, Christoph
Deposited On:22 Dec 2015 15:07
Last Modified:10 May 2016 23:39

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