3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-927-C5-933
Application du contrôle actif aux instabilités aérodynamiquesM. SUNYACH and J. C. BÉRA
Laboratoire de Mécanique des Fluides et d'Acoustique, URA 263 du CNRS, Ecole Centrale de Lyon, UCB-Lyon I, BP. 163, 69131 Ecully cedex, France
This paper describes experimental investigations in which adaptive methods are applied to various structures of active control of flow instabilities : flow excited cavity oscillations, compressor surge, and bursting phenomena in laminar boundary layer. The main results are as follows : the adaptive controller manages to automatically find its optimal characteristics in order to cancel the instability in the three experiments under consideration. In the boundary layer case, despite the non linear behaviour of the bursting process, a periodic train of artificially generated burst is significantly reduced downstream the cancelling source.
© EDP Sciences 1994