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Adaptive reduced order model of aeroelastic systems using proper orthogonal decomposition

Sánchez-Ortiz, Roberto and Quero, David and Moreno-Ramos, Rubén (2022) Adaptive reduced order model of aeroelastic systems using proper orthogonal decomposition. In: 19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022. International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2022, Madrid, Spanien. ISBN 978-840942353-8.

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Abstract

An adaptive reduced order method is considered to simulate unsteady inviscid aeroelastic scenarios for the AGARD 445.6 wing benchmark case and turbulent simulations of a NACA 0012 airfoil. The method is based on Proper Orthogonal Decomposition (POD) and it is constructed using snapshots from a Computational Fluid Dynamics (CFD) solver, which is coupled with a modal structural solver. The method adaptively switches between the full order model (FOM) and the reduced order model (ROM), which is decided on the fly by monitoring a residual estimate. A least-squares minimisation and a Galerkin projection have been used to evolve the ROM, both applied to a residual calculated only on a subset of cells, which significantly further reduces the computational effort. A collocation method for cell selection is performed automatically via LU decomposition. Various implementations of the method are discussed, such as the inclusion of Dual Time-Stepping terms in the ROM iterations, QR reorthogonalisation of POD modes, and the creation of a separate POD for the turbulent equations. Results of forced motion cases and aeroelastic responses to subcritical flow conditions are presented. The outcome is an efficient and robust method with a reduction down to 11% of the CPU time required to compute a full CFD solution.

Item URL in elib:https://elib.dlr.de/187886/
Document Type:Conference or Workshop Item (Speech)
Title:Adaptive reduced order model of aeroelastic systems using proper orthogonal decomposition
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Sánchez-Ortiz, RobertoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Quero, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moreno-Ramos, RubénE.T.S.I. Aeronautica y del Espacio, Universidad Politécnica de MadridUNSPECIFIEDUNSPECIFIED
Date:2022
Journal or Publication Title:19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
ISBN:978-840942353-8
Status:Published
Keywords:Adaptive Reduced Order Models, Proper Orthogonal Decomposition, Computational Aeroelasticity, CFD, Galerkin Projection
Event Title:International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2022
Event Location:Madrid, Spanien
Event Type:international Conference
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 - Virtual Aircraft and  Validation
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Quero-Martin, David
Deposited On:22 Aug 2022 14:37
Last Modified:18 Aug 2023 11:49

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