Experimental investigation on the evolution of axi-symmetrical synthetic jet

Abstract

The characteristics of a novel axi-symmetrical synthetic jet in quiescent environment is investigated with laser-induced fluorescence flow visualization technique. It is found that the trajectory of vortex ring is not only related to the dimensionless stroke length, but also the suction duty cycle factor. For the case of fixed dimensionless stroke length, the diameter of vortex ring tends to become smaller in the downstream direction with the increase of suction duty cycle factor.