Abstract
The present experimental study reports on the efficiency of an alternate use of two actuators placed on either side of a plane jet, to increase lateral jet expansion and to enhance mixing. The investigation is carried out using particle image velocimetry (PIV). Compared to a continuous sinusoidal excitation on both sides of the plane jet, the jet widens considerably when the actuators are switched on alternately with a well chosen timing. An increase of the widening by a factor of two is achieved. The iso-intensity contours of the fluctuating velocity indicate that the high-fluctuation zone greatly spreads out. To cite this article: M. Ben Chiekh et al., C. R. Mecanique 331 (2003).
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