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A POD-based reduced order modeling approach for the efficient computation of high-lift aerodynamics

Mifsud, Michael and Zimmermann, Ralf and Sippli, Jan and Görtz, S. (2011) A POD-based reduced order modeling approach for the efficient computation of high-lift aerodynamics. International Conference on Evolutionary and Deterministic Methods for Design, Optimization and Control with Applications to Industrial and Societal Problems (Eurogen 2011), 14-16 Sep 2011, Capua, Italy.

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Abstract

In this paper we propose a methodology for the efficient and robust computation of the aerodynamics of high-lift configurations. A reduced-order modeling approach is considered, based on the proper orthogonal decomposition (POD) of a set of high-fidelity CFD solutions or snapshots from which a reduced basis is evaluated. From this reduced-order model (ROM), a solution is predicted at an angle of attack which is outside the space spanned by the POD basis vectors. The ROM solution is subsequently used to initialize the flow solver for an accurate calculation of the aerodynamics at the same flow condition. This procedure is conducted recursively for a series of angles of attack, whereby for each and every ROM prediction, the snapshots set is augmented with the latest CFD computed flow solution. Using this methodology, a considerable reduction in the total number of iterations to reach the steady-state solution is observed when compared with conventional computational techniques used in industry for a series of computations such as drag polar computations. Ultimately, a preliminary investigation is conducted on the behavior of the reduced-order modeling approach at static stall angles of attack where aerodynamic hysteresis may occur and the aerodynamic coefficients are found to be multiple-valued functions of the angle of attack.

Item URL in elib:https://elib.dlr.de/72509/
Document Type:Conference or Workshop Item (Paper)
Title:A POD-based reduced order modeling approach for the efficient computation of high-lift aerodynamics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mifsud, MichaelMichael.Mifsud (at) dlr.deUNSPECIFIED
Zimmermann, RalfRalf.Zimmermann (at) dlr.deUNSPECIFIED
Sippli, JanJan.Sippli (at) dlr.deUNSPECIFIED
Görtz, S.Stefan.Görtz (at) dlr.deUNSPECIFIED
Date:14 September 2011
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords: proper orthogonal decomposition, reduced-order modeling, surrogate modeling, CFD, high-lift configuration.
Event Title:International Conference on Evolutionary and Deterministic Methods for Design, Optimization and Control with Applications to Industrial and Societal Problems (Eurogen 2011)
Event Location:Capua, Italy
Event Type:international Conference
Event Dates:14-16 Sep 2011
Organizer:CIRA Italy
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 > CASE
Deposited By: Mifsud, Michael
Deposited On:07 Dec 2011 15:31
Last Modified:01 Dec 2018 19:47

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