D.N. Vaulin

High-voltage pulse discharge propagating along a water surface

The results are presented of experimental studies of electrical discharge occurring in the atmosphere along a free water surface between a spike above the water surface and a remote submerged electrode during quasi-rectangular high voltage pulses. Three stages of such discharge are identified, and the stage of the discharge gliding along the water surface is investigated.

Stages of an electric discharge gliding on a water surface

Three stages of a pulse electric discharge were revealed. The discharge occurred in the atmosphere along a free water surface between a tip placed at some distance from the water surface and a distant electrode immersed in the water.

Discharges Over a Surface of Liquid Hydrocarbons

n the present work we represent results of research continuation on electric gas discharges over liquids. Our previous investigations were described earlier in [ ] they were devoted to pulsed, capillary and corona discharge plasma created over water and hydrocarbon liquids. They showed ignition of vapors of hydrocarbon liquids under impact of pulsed and capillary discharges. They revealed unknown effects on a surface of liquids created by discharges such as funnels, waves, jets and bursts. We describe now results of new experiments with tap water covered by benzene in low speed up to 20 m/s air flow and ignition of vapors in this case. We also describe new experiments with corona discharge over tap water, alcohol and kerosene created by one electrode corona and multi electrode corona discharge impact on liquids. They also revealed new electrohydrodynamics effects on surfaces of liquids under impact of these discharges.

Influence of liquid resistance on the propagation rate of a pulsed discharge above it

The results of experimental and theoretical studies on the propagation rate of pulsed discharge in air at atmospheric pressure above liquids with different conductivities are presented.

Propagation of pulsed discharge over liquids with different resistances

The results of an experimental study of pulsed discharge propagation over liquid in air under atmospheric pressure at various values of liquid resistance are presented.

Ignition of hydrocarbon films by a pulsed discharge propagating above a water surface

We present the results of experimental investigations into the ignition and combustion of hydrocarbon films deposited on a water surface by a pulsed discharge propagating above the liquid in motionless air under atmospheric pressure.

Determining the rate of electric discharge creeping over a water surface

We examine various methods based on specific experimental results for finding the rate of propagation of a pulsed discharge over a water surface.

Study of the Possibility to Use a Magnetoplasma Compressor for Plasma-Assisted Combustion in a High-Speed Flow

Results of experimental studies of the possibility to use a low-power magnetoplasma compressor for propane−air mixture ignition in a supersonic flow are presented. It is demonstrated that the regime of explosive combustion of the propane−air mixture can be stably implemented under the action of the magnetoplasma compressor. The maximum repetition rate of the magnetoplasma compressor is limited by the charging time of the storage capacitor.

The Influence of an External Magnetic Field on the Burning of a High-Speed Air-Carbon Mixture

We present the experimental results on the influence of a non-uniform magnetic field on the processes of burning an air-propane mixture in a high-speed flow; the burning is initiated by a longitudinaltransverse DC discharge. From the experiments, it follows that by varying the value and the orientation of the magnetic-induction vector with respect to the direction of the discharge current we may be able to govern the process of burning an air-propane mixture in a high-speed flow.

The propagation of a pulsed discharge above a liquid surface in the presence of barriers

This paper is a continuation of a series of experiments that studied a pulsed discharge that propagates above a liquid surface [1–5]. A detailed study of the influence of a dielectric barrier on the nature of the propagation of a pulsed discharge above a water surface was conducted. It was shown that the presence of barriers leads to an increase in the initial voltage pulse that is required for discharge propagation. Along with this, a decisive role was played by the barrier that was nearest to the point of the electrode.