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Efficient Quantification of Aerodynamic Uncertainies Using Gradient-Employing Surrogate Methods

Liu, Dishi (2013) Efficient Quantification of Aerodynamic Uncertainies Using Gradient-Employing Surrogate Methods. In: Management and Minimisation of Uncertainties and Errors in Numerical Aerodynamics Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Vol. 122. Springer Verlag. pp. 283-296. ISBN 978-3-642-36184-5. ISSN 1612-2909

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Abstract

Uncertainty quantification (UQ) in aerodynamic simulations is hindered by the high computational cost of CFD models. With gradient information obtained efficiently by using an adjoint solver, gradient-employing surrogate methods are promising in speeding up the UQ process. To investigate the efficiency of UQ methods we apply gradient-enhanced radial basis functions, gradient-enhanced point-collocation polynomial chaos, gradient-enhaced Kriging and quasi-Monte Carlo (QMC) quadrature to a test case where the geometry of an RAE2822 airfoil is perturbed by a Gaussian random field parameterized by 10 independant variables. The four methods are compared in their efficiency in estimating some statistics and the probability distribution of the uncertain lift and drag coefficients. The results show that with the same computational effort the gradient-employing surrogate methods achieve better accuracy than the QMC does

Item URL in elib:https://elib.dlr.de/82577/
Document Type:Contribution to a Collection
Title:Efficient Quantification of Aerodynamic Uncertainies Using Gradient-Employing Surrogate Methods
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Liu, Dishidishi.liu (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:Management and Minimisation of Uncertainties and Errors in Numerical Aerodynamics
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. 122
Page Range:pp. 283-296
Editors:
EditorsEmail
Eisfeld, BernhardUNSPECIFIED
Fritz, WillyEADS Deutschland
Barnewitz, HolgerAirbus Bremen, Deutschland
Thiele, FrankInstitut für Strömungsmechanik und Technische Akustik, Berlin
Publisher:Springer Verlag
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-642-36184-5
Status:Published
Keywords:UQ methods, gradient-employing surrogate methods, QMC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Seyfried, Beate
Deposited On:30 May 2013 15:31
Last Modified:22 Jan 2018 16:50

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