Model free active flow control of a simplified car model. Issue 5 (2019)

• Record Type: Journal Article
• Authors: Plumejeau, B.; Delprat, S.; Keirsbulck, L.
• Is Part Of: IFAC-PapersOnLine. Volume 52:Issue 5(2019)
• Page Start: 115
• Page End: 120
• Publication Date: 2019
• Subjects: Air flow control -- Ahmed body -- model free control -- experimental results; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2019.09.019
• Languages: English
• ISSNs: 2405-8963

Abstract

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.