On the sensitivity analysis of angle-of-attack in a model reduction setting

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Proceedings titleAIAA
Conference48th AIAA Aerospace Sciences Meeting, January 4-7, 2010, Orlando, Florida, USA
Pages# of pages: 11
AbstractThe proper orthogonal decomposition (POD) based model reduction method has been successfully used in fluid flows. However, the main drawback of this methodology rests in the robustness of these reduced-order models (ROMs) beyond the reference, from which POD modes have been derived. Any variation in the flow or shape parameters within the reduced-order model fails to predict the correct dynamics of the flow field. To broaden the spectrum of these models, the POD modes should have the global characteristics of the flow field over which the predictions are required. Mixing of snapshots with varying parameters is one way to improve the global nature of the POD modes but has shown limited success. Instead, we have used Sensitivity Analysis to include the flow and shape parameters influence within POD modes and developed robust reduced-order models for varying viscosity (Reynolds number), changing orientation and physical deformation of the bodies. In this study, we address the flows over an elliptic cylinder for a range of incidence angles. We use Sensitivity Analysis to develop reduced-order models and show their capabilities in capturing the effect of varying inflow and predicting the dynamics of the flow field.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number52444
NPARC number15141757
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Record identifierf8c5bf48-e33e-4273-a447-235362f9c5aa
Record created2010-05-05
Record modified2016-05-09
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