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Comparison of optimizer-based and flow solver-based trimming in the context of high-fidelity aerodynamic optimization

Ilic, Caslav and Abu-Zurayk, Mohammad and Keye, Stefan and Merle, Andrei (2016) Comparison of optimizer-based and flow solver-based trimming in the context of high-fidelity aerodynamic optimization. STAB 2016, 8-9 Nov 2016, Braunschweig, Germany.

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Abstract

This report compares two approaches for achieving a trimmed state of an aircraft configuration during an aerodynamic optimization. In the optimizer-based approach, balance equations are posed as direct constraints to the optimizer. In the flow solver-based approach, balance equations are satisfied within the flow solver evaluation. These approaches are applied to a flying wing case, where blended trailing edge deflection is used to control the pitching moment. The wing is treated as rigid, and lift and pitching moment balance equations are taken into account for trimming. Tests are performed with varying numbers of shape design parameters and with varying numbers of flight points. It is concluded that the flow solver-based approach performs more robustly, and thus should be preferred in general, even though it may take more time than the optimizer-based approach.

Item URL in elib:https://elib.dlr.de/109588/
Document Type:Conference or Workshop Item (Speech)
Title:Comparison of optimizer-based and flow solver-based trimming in the context of high-fidelity aerodynamic optimization
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ilic, Caslavcaslav.ilic (at) dlr.deUNSPECIFIED
Abu-Zurayk, Mohammadmohammed.abu-zurayk (at) dlr.deUNSPECIFIED
Keye, Stefanstefan.keye (at) dlr.deUNSPECIFIED
Merle, Andreiandrei.merle (at) dlr.deUNSPECIFIED
Date:November 2016
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 120-121
Status:Published
Keywords:optimization, aerodynamic, trimming, adjoint, gradient
Event Title:STAB 2016
Event Location:Braunschweig, Germany
Event Type:national Conference
Event Dates:8-9 Nov 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 - Flight Physics (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Transport Aircraft
Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Ilic, Caslav
Deposited On:15 Dec 2016 10:47
Last Modified:31 Jul 2019 20:06

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