A vortex generator (VG) is one of the most successful devices used for suppression of flow separation.A conventional VG is a passive control device, so that it may suffer from an inherent drag penalty.As an alternative, we spidertattooz.com use a dielectric-barrier-discharge plasma actuator (PA) as a VG.Since few studies have been made on such a vortex generator-type plasma actuator (VG-PA), many questions still remain open, e.g.
, the effectiveness and the performance of the VG-PA for suppression of vortex shedding from a bluff body.In the present study, we experimentally evaluate the performance of the VG-PA by applying it to a pantograph head model of high-speed trains.The Reynolds number based on the freestream velocity and the width of the pantograph head model is 7200.The spanwise velocity induced by the VG-PA is about 33% of the freestream velocity.The flow field il barone wine is measured by using particle image velocimetry.
The present results show that the vortex shedding from a pantograph head model can significantly be suppressed by the VG-PA, which amounts to about 60% reduction in the transverse velocity fluctuations.It is also shown that a burst discharge control significantly improves the control effect in the single-side configuration, in which the vortex shedding is not much suppressed in the continuous mode.