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Global Aerostructural Design Optimization of More Flexible Wings for Commercial Aircraft

Wunderlich, T. F. and Dähne, S. and Reimer, L. and Schuster, A. (2021) Global Aerostructural Design Optimization of More Flexible Wings for Commercial Aircraft. Journal of Aircraft, 58 (6), pp. 1254-1271. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.C036301. ISSN 0021-8669.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://doi.org/10.2514/1.C036301


In the German Aerospace Center's Virtual Aircraft Technology Integration Platform project, a process for aerostructural wing optimization based on high-fidelity simulation methods is continuously developed. Based upon a parametric geometry, flight performance under transonic flight conditions and maneuver loads are computed by solving the Reynolds-averaged Navier-Stokes equations. 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. Global aerostructural wing optimizations are performed for wings with a conventional composite wing-box structure and for more flexible wings. The minimization of the fuel consumption for three flight missions represents the objective function. The optimizations are performed for variable and constant wing planforms as well as with and without consideration of active maneuver load alleviation. A significant mass reduction of the wing box is obtained with the more flexible wing concept, resulting in a decrease in fuel consumption of about 3%. For the optimizations with active maneuver load alleviation, the more flexible wing concept shows an additional reduction of the fuel consumption on the order of 2%. The more flexible wing concept results in optimized wing geometries with increased aspect ratios and reduced taper ratios.

Item URL in elib:https://elib.dlr.de/147835/
Document Type:Article
Title:Global Aerostructural Design Optimization of More Flexible Wings for Commercial Aircraft
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wunderlich, T. F.tobias.wunderlich (at) dlr.dehttps://orcid.org/0000-0001-8829-7600
Dähne, S.sascha.daehne (at) dlr.deUNSPECIFIED
Reimer, L.lars.reimer (at) dlr.deUNSPECIFIED
Schuster, A.andreas.schuster (at) dlr.deUNSPECIFIED
Date:27 September 2021
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.C036301
Page Range:pp. 1254-1271
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:multidisciplinary optimization and MDO and wing optimization and transonic aerodynamics and static aeroelasticity and fluid-structure coupling and Reynolds-averaged Navier-Stokes and RANS and finite element method and FEM
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Aircraft Technologies and Integration
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Institute for Aerodynamics and Flow Technology > CASE, BS
Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Wunderlich, Dr.-Ing. Tobias
Deposited On:04 Jan 2022 13:52
Last Modified:17 Feb 2022 13:29

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