The presented video illustrates different types of flow structures generated by a DBD plasma actuator (DBDPA) as a function of actuation conditions. The DBDPA used in this study has been fabricated on a printed circuit board (PCB) made of flame retardant-4 material. A high voltage power amplifier (Trek 20/20C-HS) has been used as a power source for the plasma actuator. A high speed laser (Photonics DS-532-10), a high speed camera (Phantom v341, Vision Research Inc.) and a seeding generator (oxford laser) has been used for imaging the instantaneous flow structures. The actuator operates in two different modes namely continuous mode and burst mode at an applied potential of 14kV peak to peak and driving frequency of 2kHz. In continuous actuation mode, the DBDPA initially generates a starting vortex, which later on transforms to a wall jet like flow. In burst actuation mode, periodic vortex formation takes place at smaller burst frequency and repeating dipoles are formed at higher burst frequency. Overall, the video demonstrates the capability of DBDPA as a potential vortex generator.
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