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Model free active flow control of a simplified car model

Abstract : A model free control (MFC) approach is presented and used to symmetrize the unstable wake flow of a simplified car model named Ahmed body. Such unstable phenomena with regards to the space-time evolution of the low pressure wake vortex core, is known to increase the global drag of square back vehicles. Results highlight the ability of a MFC to reduce the wake symmetry breaking phenomena by using lateral blowing slit jets. A model free control scheme derived from (Fliess and Join, 2013) is proposed and a tuning procedure is suggested. At last experimental results on an Ahmed body in wind tunnel are provided.
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Submitted on : Friday, May 27, 2022 - 9:55:32 AM
Last modification on : Saturday, May 28, 2022 - 3:42:21 AM

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Baptiste Plumejeau, Sebastien Delprat, Laurent Keirsbulck. Model free active flow control of a simplified car model. 9th IFAC Symposium on Advances in Automotive Control, AAC 2019, Jun 2019, Orléans, France. pp.115-120, ⟨10.1016/j.ifacol.2019.09.019⟩. ⟨hal-03679780⟩

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