Study on Spray Characteristics of Corona Discharge on Cavity-Type Hydro Pole

Atomization of corona discharge has potential applications in electrostatic dust removal, pesticide spraying and other fields. To investigate the gas-liquid two-phase flow discharge characteristics, the cavity-type spray electrode was used in the experiment for the first time. By measuring the voltage-current characteristics of different atomization poles, water consumption with different concentration of solution and other physical parameters, the discharge characteristics of cavity-type spray electrode were analyzed. Experiments show that, in the condition of dry electrode, the smaller the curvature radius of the cavity-type electrode, the larger the discharge current, and the current difference increases with the increase of voltage. In the condition of atomization corona discharge, electrode shape or concentration of the solution has no obvious effect on the discharge current, but has more significant effect on the consumption of the solution. The form of atomization under different voltages is various and the dynamics process of the droplet in electric field is also different.