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Surrogate-Based Aerodynamic Shape Optimization of a Wing-Body Transport Aircraft Configuration

Han, Zhong-hua and Abu-Zurayk, Mohammad and Görtz, Stefan and Ilic, Caslav (2018) Surrogate-Based Aerodynamic Shape Optimization of a Wing-Body Transport Aircraft Configuration. In: AeroStruct: Enable and Learn How to Integrate Flexibility in Design Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 138. Springer International Publishing. pp. 257-282. ISBN 978-3-319-72020-3. ISSN 978-3-319-72019-7

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Official URL: https://doi.org/10.1007/978-3-319-72020-3_16

Abstract

Aerodynamic shape optimization driven by high-fidelity computational fluid dynamics (CFD) simulations is still challenging, especially for complex aircraft configurations. The main difficulty is not only associated with the extremely large computational cost, but also related to the complicated design space with many local optima and a large number of design variables. Therefore, development of efficient global optimization algorithms is still of great interest. This study focuses on demonstrating surrogate-based optimization (SBO) for a wing-body configuration representative of a modern civil transport aircraft parameterized with as many as 80 design variables, while most previous SBO studies were limited to rather simple configurations with fewer parameters. The freeform deformation (FFD) method is used to control the shape of the wing. A Reynolds-averaged Navier-Stokes (RANS) flow solver is used to compute the aerodynamic coefficients at a set of initial sample points. Kriging is used to build a surrogate model for the drag coefficient, which is to be minimized, based on the initial samples. The surrogate model is iteratively refined based on different sample infill strategies. For 80 design variables, the SBO-type optimizer is shown to converge to an optimal shape with lower drag based on about 300 samples. Several studies are conducted on the influence of the resolution of the computational grid, the number and randomness of the initial samples, and the number of design variables on the final result.

Item URL in elib:https://elib.dlr.de/118964/
Document Type:Contribution to a Collection
Title:Surrogate-Based Aerodynamic Shape Optimization of a Wing-Body Transport Aircraft Configuration
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Han, Zhong-huaZhong-hua.Han (at) dlr.deUNSPECIFIED
Abu-Zurayk, MohammadMohammad.Abu-Zurayk (at) dlr.deUNSPECIFIED
Görtz, StefanStefan.Goertz (at) dlr.deUNSPECIFIED
Ilic, Caslavcaslav.ilic (at) dlr.deUNSPECIFIED
Date:10 February 2018
Journal or Publication Title:AeroStruct: Enable and Learn How to Integrate Flexibility in Design
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:138
DOI :10.1007/978-3-319-72020-3_16
Page Range:pp. 257-282
Editors:
EditorsEmail
Heinrich, RalfDLR
Publisher:Springer International Publishing
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:978-3-319-72019-7
ISBN:978-3-319-72020-3
Status:Published
Keywords:CFD, aerodynamics, unsteady, transonic, convergence, ROM, POD, LANN wing
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: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, BS
Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Görtz, Stefan
Deposited On:09 Mar 2018 09:49
Last Modified:09 Mar 2018 09:49

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