Spark and corona discharges in air on a mixed voltage
N. G. Cherepanov, А. А. Zhukov, V. I. Krylov
The Khabarovsk State Pedagogical University, Khabarovsk, Russia
It was made the experiments on investigation of requirement for origin of the high-frequency (with the component of a stationary electric field) discharges in an air gap at coefficient of electric field inhomogeneity of 3.7. It is shown that there are values of physical parameters (pressure, frequency, voltage of a variable and stationary component of electric field), at which there is a rise of different types of the dischanges. It mean physically that it is possible to speak about phase states of ionization air in a nonuniform electric field and about phase transitions at change of relations, for example, between amplitude of alternate electric field voltage and gas pressure. It are built the two-dimensional and three-dimensional phase spaces, in which are spotted areas of the corona and spark discharges, disjointed by curves or surfaces (in three-dimensional space), being an analog of curves of phases equilibrium.
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