Abstract
The present study attempts to clarify flow characteristic 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 depends on the normalized stroke length. The streamwise mean velocity distributions along the centerline of jets agree quantitatively well with the experimental results. The acceleration region, where the streamwise velocity is increasing partially, was observed downstream of slot lips. This is caused by the reductions of the decreasing rate of the induced velocity from the shedding circulations and the increasing rate of the induced velocity from the wall circulations. The upstream streamwise mean velocity is induced from the wall and shedding circulations and the downstream streamwise velocity is mostly supplied from the shedding circulations.
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