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Global Aero-Structural Design Optimization of More Flexible Wings for Commercial Aircraft

Wunderlich, Tobias and Dähne, Sascha and Reimer, Lars and Schuster, Andreas and Brodersen, Olaf (2020) Global Aero-Structural Design Optimization of More Flexible Wings for Commercial Aircraft. In: AIAA Aviation 2020 Forum. AIAA AVIATION 2020 Forum, Virtual Event, 2020, 15.-19. Juni 2020, Virtuelle Konferenz. doi: 10.2514/6.2020-3170. ISBN 978-162410598-2.

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Official URL: https://arc.aiaa.org/doi/abs/10.2514/6.2020-3170


In the scope of the DLR project VicToria (Virtual Aircraft Technology Integration Platform), an integrated process for aero-structural wing optimization based on high fidelity simulation methods is continuously developed and applied. Based upon a parametric CAD model, flight performance under transonic flight conditions and maneuver loads are computed by solving the Reynolds-averaged Navier--Stokes equations (RANS). Structural mass and elastic characteristics of the wing are determined from structural sizing of the composite wing box for essential maneuver load cases using computational structural mechanics. Static aeroelastic effects are considered in all flight conditions by direct iterative coupling between the flow solver and the structural mechanics solver. Active maneuver load alleviation (MLA) is integrated in the process by a simplified modeling of control surface deflections by using a mesh deformation technique. Landing gear and control surface integration constraints were added compared to previous versions of the optimization process. Global aero-structural wing optimizations are successfully performed for wings with conventional composite wing box structure and for more flexible wings. The latter is accomplished by introducing modifications of the structural concept and the strain allowable. To reduce the CO2 emissions per passenger kilometer, the minimization of the combined fuel consumption for three typical flight missions represents the objective function. Wing optimizations are performed for variable and constant planform parameters as well as with and without consideration of MLA. A significant mass reduction of the optimized wing box is obtained with the more flexible wing concept, resulting in a drop in combined fuel consumption of about 3%. For wing optimizations with MLA the more flexible wing concept shows an additional reduction of the combined fuel consumption in the order of 2%. The more flexible wing concept results in optimized wing geometries with increased aspect ratio and reduced taper ratio.

Item URL in elib:https://elib.dlr.de/137743/
Document Type:Conference or Workshop Item (Speech)
Title:Global Aero-Structural Design Optimization of More Flexible Wings for Commercial Aircraft
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wunderlich, Tobiastobias.wunderlich (at) dlr.dehttps://orcid.org/0000-0001-8829-7600
Dähne, SaschaSascha.Daehne (at) dlr.dehttps://orcid.org/0000-0003-3497-3225
Reimer, LarsLars.Reimer (at) dlr.deUNSPECIFIED
Schuster, AndreasAndreas.Schuster (at) dlr.deUNSPECIFIED
Brodersen, OlafO.Brodersen (at) dlr.deUNSPECIFIED
Date:June 2020
Journal or Publication Title:AIAA Aviation 2020 Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2020-3170
Keywords:multidisciplinary design optimization, wing design, wing optimization, aero-structural wing optimization, maneuver load alleviation, more flexibel wing, Composite wing box, MDO, RANS, FEM, MLA
Event Title:AIAA AVIATION 2020 Forum, Virtual Event, 2020
Event Location:Virtuelle Konferenz
Event Type:international Conference
Event Dates:15.-19. Juni 2020
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 - VicToria (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology
Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Wunderlich, Dr.-Ing. Tobias
Deposited On:19 Nov 2020 07:47
Last Modified:04 Dec 2020 13:51

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