Study of flow fields induced by surface dielectric barrier discharge actuator in low-pressure air

Abstract

Surface dielectric barrier discharge (SDBD) is a promising method for a flow control. Flow fields induced by a SDBD actuator driven by the ac voltage in static air at low pressures varying from 1.0 to 27.7 kPa are measured by the particle image velocimetry method. The influence of the applied ac voltage frequency and magnitude on the induced flow fields is studied. The results show that three different classes of flow fields (wall jet flow field, complex flow field, and vortex-shape flow field) can be induced by the SDBD actuator in the low-pressure air. Among them, the wall jet flow field is the same as the tangential jet at atmospheric pressure, which is, together with the vertical jet, the complex flow field. The vortex-shape flow field is composed of one vertical jet which points towards the wall and two opposite tangential jets. The complex and the vortex-shape flow fields can be transformed to the wall jet flow field when the applied ac voltage frequency and magnitude are changed. It is found that the discharge power consumption increases initially, decreases, and then increases again at the same applied ac voltage magnitude when the air pressure decreases. The tangential velocity of the wall jet flow field increases when the air pressure decreases. It is however opposite for the complex flow field. The variation of the applied ac voltage frequency influences differently three different flow fields. When the applied ac voltage magnitude increases at the same applied ac voltage frequency, the maximal jet velocity increases, while the power efficiency increases only initially and then decreases again. The discharge power shows either linear or exponential dependences on the applied ac voltage magnitude.

Ultrasound generated by alternating current dielectric barrier discharge plasma in quiescent air

“…The traditional DBD actuator is made of two electrodes which are separated by a thin dielectric film and driven by a high-voltage power supply, such as alternating current (AC) [5][6][7][8][9][10][11][12], nanosecond pulsed (NS) [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] and direct current (DC) [29] high-voltage power supply. Recently, DBD driven by an AC high-voltage power supply has experienced tremendous growth due to its unique properties, including low energy consumption, simple construction and installation and the possibility of retrofitting, fast time response [30][31][32].…”

Atmospheric-pressure pulsed plasma actuators for flow control: shock wave and vortex characteristics

“…Since 2012, we investigate the nanosecond-pulse breakdown in surface SDBD and PSJ. The shock wave characteristics of nanosecond-pulse SDBD and PSJ are studied for optimizing the flow disturbance of the plasma actuators [32][33][34][35][36][37][38][39][40]. In this paper, we present shock wave characteristics in different plasma actuators and discuss generation of a starting vortexes in nanosecond-pulse plasma actuators under different conditions.…”

Experiment on Jet Flow Control by SDBD Plasma Actuator

“…Total discharge current is measured by a current probe (Pearson, Model 6595). All waveforms are recorded by a digital oscilloscope (Agilent Model DSO3024A) [15]. Fig.…”