Abstract
The present study attempts to clarify flow characteristics in a synthetic jet by a discrete vortex method, particularly focusing on the streamwise mean velocity along the centerline of jets. The onset condition of the synthetic jet was simulated reasonably and the streamwise mean velocity distributions along the centerline of jets agree quantitatively well with the experimental results. For the synthetic jet, the acceleration region, where the streamwise velocity is increasing partially, is caused by the decrease of the negative velocity induced from the wall circulations and the reductions of the decreasing rate of the velocity induced from the shedding circulations.
