シンセティックジェットによる周期的な流れ場変動(安定性・乱流境界層・せん断流・遷移(4),一般講演)

概要

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A synthetic jet is one of the methods of generating the jet and a synthetic jet actuator has been shown to be a useful tool for flow control. For the separation control, it is necessary to clarify the periodic behavior of the synthetic jet. In this study, the effect of the synthetic jet frequency f on the behavior of vortex ring and the generation of the longitudinal vortex in the case of the synthetic jet in a crossflow is investigated. Wind tunnel experiments are carried out using hot-wire anemometry and the flow visualization technique was used to aid in understanding the vortical field. For f=60Hz, the synthetic jet promotes the mixing agitation in contrast to the f=200Hz case. The longitudinal vortex generated by the interaction between a jet and a crossflow was not observed for f=200Hz. The generation of the longitudinal vortex is affected by the synthetic jet frequency.
日本流体力学会の論文
2009-09-02