Investigation of the effects of pulse repetition frequency in a mixed electric field on a SDBD-like plasma jet
Authors
Abstract
In this paper, the design, performance and characterization of a low temperature argon plasma jet with a Surface
Dielectric Barrier Discharge (SDBD)-like structure are presented. Based on this structure, the argon plasma
jet is generated in a SDBD-like structure with a mixed electric field. SDBD-like structure, refers to the plasma
jet generated by the surface dielectric barrier discharge. The effects of high frequency electric pulse as the
main igniter for plasma jet generation and low frequency sinusoidal electric field in order to modify the dynamic
behavior of plasma jet are investigated in this paper. The effect of these variations on the plasma jet along with
the decrease in pulse repetition frequency were recorded by Schlieren imaging method. This study revealed the
important role of decreasing the pulse repetition frequency in the mixed electric field in the SDBD-like plasma jet
structure. Increasing the cross-sectional area of the plasma colliding with the target surface is the most important
advantage of this structure for the generation of plasma jets. Also, the trend of decreasing plasma column
continuity with increasing pulse repetition frequency is another result of this study. Under these conditions, the
diameter of the cross section of the plasma jet increases to 9 mm without increasing the consumption of more
electrical power and with equal jet length. Finally, the surface hydrophilicity was measured after treatment by
plasma jet and the operation resulted in a super-hydrophilic surface.
