Investigation of Electrical Conductivity and EHD Flows of a Weakly Concentrated Transformer Oil Solution with an Electron Acceptor Impurity (Iodine)

Abstract

The results of experimental and theoretical studies of the electrical conductivity of weakly concentrated solu-tions of liquid dielectrics (LD) with a chemically active impurity and associated electrohydrodinamic (EHD) flows are presented. The studies were carried out on the base of a multi-ion model of electrical conductivity, which makes it possible to adequately describe both the dissociation-recombination interactions of ions and the electrochemical injection of ions from the electrode surface. It is shown that recombination processes in the volume of the LD lead to a slow disappearance of the space charge with a characteristic time of hours and days, which does not allow to significantly reduce the distribu-tion of the space charge in the LD, which reduces the intensity of EHD flows. On the base of the obtained theo-retical and experimental data on electrical conductivity, numerical calculations were carried out which confirmed the results of observations on the development and structure of EHD flows and current characteristics.