Effect of a direct current bias on the electrohydrodynamic performance of a surface dielectric barrier discharge actuator for airflow control

Abstract

Articles you may be interested inScaling of maximum velocity, body force, and power consumption of dielectric barrier discharge plasma actuators via particle image velocimetryThe effect of a DC bias on the electrohydrodynamics (EHD) force induced by a surface dielectric barrier AC discharge actuator for airflow control at the atmospheric pressure is investigated. The measurement of the surface potential due to charge deposition at different DC biases is carried out by using a special designed corona like discharge potential probe. From the surface potential data, the plasma electromotive force is shown not affected much by the DC biases except for some reduction of the DC bias near the exposed electrode edge for the sheath-like configuration. The total thrust is measured by an analytical balance, and an almost linear relationship to the potential voltage at the exposed electrode edge is found for the direct thrust force. The temporally averaged ionic wind characteristics are investigated by Pitot tube sensor and schlieren visualization system. It is found that the ionic wind velocity profiles with different DC biases are almost the same in the AC discharge plasma area but gradually diversified in the further downstream area as well as the upper space away from the discharge plasma area. Also, the DC bias can significantly modify the topology of the ionic wind produced by the AC discharge actuator. These results can provide an insight into how the DC biases to affect the force generation. V C 2015 AIP Publishing LLC.

The effects of applying different bias voltages and phase differences on performance of an asymmetric surface dielectric barrier discharge; an experimental investigation

“…In 2015, a similar study was reported by Yan et al, in which the effect of a DC bias on the EHD force induced by an AC SDBD actuator was investigated [27]. They applied the +∕− DC voltages to the upper electrode and connected the lower one to an AC power supply.…”

“…Considering the velocity profiles also revealed that in the region near the exposed electrode edge (discharge zone), the applied DC and DC-offset voltages had little effects on the wind velocities, since the different values of the DC and DC-offset voltages had nearly the same velocity profiles. In fact, in this area because of good electrical conductivity of the plasma the applied DC and DC-offset biases give rise to a little voltage drop that causes a less effect on the EHD force [27]. However, downstream of the discharge area the influences of these voltages can be obviously seen.…”

“…The induced flow of the ASDBD, which was driven by ns-HV pulses superimposed on a DC or low frequency sinusoidal voltage, was investigated by Opaits et al [26]. Recently, Yon et al [27] studied the effects of applying DC bias voltage to the exposed electrode on the induced EHD force, while the lower electrode was connected to AC sinusoidal voltage. In this paper, we also studied the effects of the input electrical parameters on the ASDBD performance.…”

Geometry Effects of SDBD Actuator on Atmospheric-Pressure Discharge Plasma Airflow Acceleration

“…The value of R 3 can simply be calculated to be about dozens of megaohms (generally about 50 M ) using the same method as that used in [36]. It is much smaller than the total resistor of the measuring circuit (about 1.1 G ).…”

Characterization of surface dielectric barrier discharge (SDBD) based on PI/Al2O3 nanocomposite

“…Plenty of reports have investigated the performances of the plasma actuators for a variety of parameters including exposed electrode shape, electrode length or width, material permittivity, voltage waveform, pressure, and so on. Although the produced body force or induced flow velocity has been optimized and enhanced, attentions to their robustness during the long plasma processing are far from adequate at present.…”