Aerodynamic Flow Acceleration with One Atmosphere Uniform Induced by Single and Multiple DBD Plasma Actuation Based on PIV

Abstract

The aerodynamic flow acceleration with one atmosphere uniform induced single and multiple dielectric-barrier-discharge plasma actuation were studied based on PIV. Firstly, the flow fields induced by the single dielectric barrier discharge with different discharge models, and actuation parameters were investigated. In term of the obtained velocity distributions, a comparative study on the effect of excitation voltages, carrier frequencies, pulse frequencies and duty ratios on plasma actuation was presented and the optimum actuation parameters was provided. Moreover, through double actuators alternating discharge, the multiple dielectric barrier discharge mode have been proposed and tested. The efficiencies of the plasma actuators in Pulsed-pulsed, Steady-steady, Pulsed-steady and Steady-pulsed discharge modes were explored. Finally, based on the above results,the flow acceleration performance of single and multiple plasma actuators has been discussed and the more efficient discharge pattern has been proposed.The results of this study indicate: 1) The induced velocity increases linearly with excitation voltage and frequency. 2) When fp 300Hz, it shows an opposite tendency. 3) The airflow acceleration effect of multiple plasma actuators mainly occurs in paraelectric direction and the Pulsed-pulsed is the more efficient multiple plasma actuation mode.