Étude expérimentale des auto-oscillations d'un jet plan confiné au sein d'une cavité contenant un obstacle

Abstract

We investigate the oscillation phenomena occurring when a two-dimensional plane jet emerges from a rectangular nozzle into a cavity with a body inside. It is shown that far from the lower oscillation limit, the frequencies of self-sustained oscillations are only governed by geometrical parameters. The evolutions of the Strouhal versus Reynolds number show that the effect of the geometry downstream the bluff-body is important for the control of the oscillation mechanism.