The Phenomenology and Physics of Peristaltic Flow Acceleration Induced by Multiple DBD Plasma Actuators Based on PIV

摘要

Using a plexiglas plate model, the phenomenology and' physics of peristaltic flow acceleration induced by multiple DBD plasma actuators were studied based on PIV. Firstly, based on the survey to the several basic multiple plasma actuators discharge mode, the peristalsis-acceleration plasma actuation modes, asynchronous periodic pulsed actuation and duty cycle pulsed actuation, have been proposed and tested. The velocity fields induced by multiple DBD plasma actuations with different phase angles and duty cycle ratios were acquired and the momentum transfer characteristics of the flow field were discussed. Finally, based on the above results the technical superiority and mechanism of the peristalsis-acceleration multiple DBD plasma actuation were analyzed. The results show that the peristaltic flow acceleration effect of multiple plasma actuators mainly occurs in paraelectric direction and the mechanism of peristaltic flow acceleration is ejection pushing rather than injection pumping. The asynchronous and duty cycle pulsed actuation modes, with energy consumption increased by only 10%, but for 65% and 42% of the increase in downstream velocity, are promising in velocity improving and energy saving.