Voltage breakdown and formation film discharge along a surface of a water jet

Abslracf It is known, that alongside with vacuum lighting protectors large throughput capacity on a current have the dischargers operating a sliding creeping discharge of dielectric medium. I n tendered activity the voltage breakdown and formation of turn electric discharge in a zone of tenacious turbulent stirring of a buoyant jet of water driving in a direction crosswise of an axis of an clcctrode system is studied. The border zone of a spray actually represents biphasic medium with concentration microbubbles of a cavitation parentage of up to 107 cm-3, therefore in her there are favourable conditions for a breeding o f electrons. By it the considwed breakdown essentially differs from a low-voltage breakdown in a reposing liquid. Tlie abnormal properties of electric discharge in a buoyant jet show both at the stage of ignition, and at sustained combustion. So the threshold voltages of a breakdown are reduced in some times already at speeds of a spray 30 mis, simultaneously approximately duration o f the prebreakdown stage i s reduced to one two order. At arc stage of combustion discharge there is a developed emitting surface, a depth of a plasma sheath about I mm. The change on