Abstract
In this study, an attempt was made to control the diffusion of a round jet using a concentric dielectric barrier discharge plasma actuator. By changing the size of the electrodes, and the input frequency and voltage, it was confirmed that the jet diffusion characteristics could be controlled. By driving the plasma actuator, the induced flow was directed towards the central axis, and then ejected vertically from the wall. This lead to a velocity increase in the circular jet, which allowed control of velocity fluctuations and three-dimensional collapse of the jet structure. By changing the size of the electrode, it was possible to increase the volume flow rate of the main jet by the addition of the plasma induced flow. Decreasing the size of the exposed electrode caused enhanced contraction of the main flow. In contrast, larger electrodes caused the main jet to become wider.
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