Coaxial cylinder dielectric barrier discharge is one of the major approaches for plasma-assisted combustion

and it is important to reveal its basic discharge characteristics for optimizing control strategy. Consequently

with high-frequency AC actuation

the characteristics of coaxial cylinder dielectric barrier discharge

including breakdown voltage

discharge image

Lissajous figure

and discharge power

were experimentally studied by changing gas type

gas flow

and power output parameters. The results demonstrate that the curve of breakdown voltage is in a "V" shape with increase of frequency

during which an optimal frequency responding to the lowest breakdown voltage exists. Compared with the effect of frequency

the effect of gas flow on breakdown voltage is not obvious. When the gas flow equals 0

the power consumption increases linearly with frequency and voltage rising

respectively

and the power growth rate varies with voltage faster than with frequency. Moreover

when there is an incoming flow

with the effect of "blow off" and influence on charge distribution

the linearity of power curves varied with frequency and voltage will both decrease. And with increase of gas flow

the discharge intensity will be enhanced and weaken alternately

which results in a "M"-type curve with overall decreasing trend in power consumption. In addition

CH particles are generated under the discharge of methane

and the CH* emission intensity rises linearly with increase of voltage.