Abstract
The influence of ambient temperature on the various parameters of negative corona discharge in atmospheric dry air with coaxial cylindrical electrodes is investigated. The calculations are achieved using the finite element method by COMSOL Multiphysics software. The investigation aims to notice the effect many of working temperatures on the I-V characteristic curve of negative corona discharge in the air. The calculations of several parameters (electron density, temperature, ...) are presented visually and discussed. The results of the work are compared with theoretical and experimental data and they are in a good agreement.
Highlights
The corona discharge is one of the types of electrical discharge, characterized by a corona lighting creation and set up from the gas ionization around the surface of conductor [1]
Negative corona discharge in atmospheric air is investigated in this paper
The electron temperature and reduce electric field are decreasing as the radial distance from cathode to anode increased
Summary
The corona discharge is one of the types of electrical discharge, characterized by a corona lighting creation and set up from the gas ionization around the surface of conductor [1]. The discharge has normally taken place in high-voltage systems when the electrical field strength surrounded by the electrode is high enough but is not high for electrical breakdown between nearby connectors to happen [2]. If the electrical field is high enough, the gas surrounding it at that point comes in and becomes conductive, and the electric field intensity at this point becomes very higher. It makes for the electron to drift and ionize of the gas around the cathode and spread out towards the anode [3]. More electrons will generate through secondary emission at the cathode by the positive ions. The secondary electrons are accountable for sustaining the corona discharge. The current flows from the high voltage
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