Frequency-Selective Galerkin Models for Turbulent Boundary Layer Drag Reduction

https://doi.org/10.3182/20140824-6-ZA-1003.02743Get rights and content

Abstract

Galerkin models for 3D-turbulent boundary layers usually are too complex to be successfully incorporated into model based control strategies. Limiting the frequency spectrum of the ensemble data offers a possibility to reduce the model size and still map the control-relevant dynamics into the reduced-order model. An adaptation of the standard POD-Galerkin procedure is proposed using the example of a turbulent boundary layer, which is actuated by a periodic volume force. A closed-loop simulation shows an exemplary application of such a reduced order model in a model based control setup.

Keywords

Flow control
model reduction
model based control

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This work was supported by the Deutsche Forschungsgemeinschaft (DFG) with the grant AB65/12-1 in the Research Unit “Active Drag Reduction”.

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