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Non-Linear POD-based Reduced Order Models for Steady Turbulent Aerodynamics

Zimmermann, Ralf and Görtz, Stefan (2010) Non-Linear POD-based Reduced Order Models for Steady Turbulent Aerodynamics. RAeS Conference 2010 Applied Aerodynamics: Capabilities And Future Requirements, 27.-28. Juli 2010, Bristol, UK.

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Abstract

A reduced order modelling approach for predicting steady aerodynamic flows based on Computational Fluid Dynamics (CFD) and global Proper Orthogonal Decomposition (POD) using a suitable data transformation for obtaining problem-adapted global basis modes is presented. Model-order reduction is achieved by parameter space sampling, reduced solution space representation via global POD and restriction of a CFD solver to the reduced POD subspace. Solving the governing equations of fluid dynamics is replaced by solving a non-linear least-squares optimization problem. The method is demonstrated by computing reduced-order solutions to the compressible Navier-Stokes equations for an industrial aircraft conguration based on a set of subsonic CFD solutions. Results are shown to be more accurate than those obtained by POD-based interpolation using Kriging and the Thin Plate Spline method (TPS) when compared to reference CFD solutions. The cost of computing the reduced-order solution is two orders of magnitude lower than that of computing a CFD solution.

Item URL in elib:https://elib.dlr.de/67580/
Document Type:Conference or Workshop Item (Paper)
Title:Non-Linear POD-based Reduced Order Models for Steady Turbulent Aerodynamics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zimmermann, Ralfralf.zimmermann (at) dlr.deUNSPECIFIED
Görtz, Stefanstefan.görtz (at) dlr.deUNSPECIFIED
Date:July 2010
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Computational Fluid Dynamics, Global POD, Reduced Order Modelling, Compressible Navier-Stokes Equations
Event Title:RAeS Conference 2010 Applied Aerodynamics: Capabilities And Future Requirements
Event Location:Bristol, UK
Event Type:international Conference
Event Dates:27.-28. Juli 2010
Organizer:RAeS Royal Aeronautical Society
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > CASE
Deposited By: Zimmermann, Dr. Ralf
Deposited On:05 Jan 2011 16:07
Last Modified:05 Jan 2011 16:09

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