Relation between Extension of a Filamentary Channel from a Water Droplet Placed on a Hydrophobic Sheet under AC Field and Flashover via the Droplet

Higashiyama, Yoshio; Kosano, M.

doi:10.1109/07ias.2007.333

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…As the discharge enters process B, the chemical bonds of water molecules are broken, and abundant liberty ions exist in the water droplets after the micro-discharge channel contacts with water droplet. The negative ions are neutralized by the positive ions of the micro-discharge channels, and the excess positive ions accumulate at the lower end owing to the dielectric properties of the high-density water droplets [ 22 ]. A high resistance is observed as the charge moves forward.…”

Section: Discussionmentioning

confidence: 99%

“…For example, when water droplets cover an insulator surface, they distort the electric field distribution on the dielectric surface in a wet environment [19,20]. Partial discharge occurs around water droplets and causes flashover [21][22][23]. Therefore, studying the discharge characteristics of SDBD under water-covered conditions is important for its application in these fields.…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of annular surface dielectric barrier discharge with microsecond pulse under water-covered condition

Xu,

Lai,

Qin

et al. 2024

PLoS ONE

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Surface dielectric barrier discharge (SDBD) has wide applications in flow control, wastewater treatment, and biomedicine. The dielectric surface of an SDBD actuator is generally attached to the water droplets during applications. Thus far, only a few studies have been conducted on the effects of water covering the dielectric surface on the discharge characteristics of SDBD. Therefore, the effects of water droplets on the discharge of an SDBD actuator based on a repetitive microsecond pulse power supply were investigated in this study. The results show that a filament micro-discharge channel forms between the light and dark regions at the internal edge of the SDBD high-voltage electrode and develops toward the center of the dielectric surface in the region without water droplet coverage. SDBD in the water-covered region was divided into two stages. This paper compares the electrical characteristics of SDBD with and without water droplet, and explores the electric field distortion effect of water droplet endpoints through 3D simulation.Based on the theories of water droplet polarization and gas discharge, the effects of water droplets on plasma development and surface charge accumulation under water-covered condition were analyzed. The water droplet plays a similar role as a "secondary electrode" during the discharge process.

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Section: Discussionmentioning

confidence: 99%