Numerical modeling negative corona under the influence of applied voltage variation

Alnaemi, Hala; Algwari, Qais Thanon

doi:10.33899/edusj.2020.128762.1120

	Numerical modeling negative corona under the influence of applied voltage variation
Journal of Education and Science
Article 35, Volume 30, Issue 2, 2021, Pages 79-91 PDF (931.84 K)
Document Type: Research Paper
DOI: 10.33899/edusj.2020.128762.1120
Authors
Hala Alnaemi^* ¹; Qais Thanon Algwari²
¹Department of Physics, College of Education for Pure Science, Mosul University
²Electronic Department, College of Electronics Eng. Ninevah University
Abstract
In high-voltage gaseous insulation systems, the corona discharge is important because it can lead to drop of the insulating qualities of the gas in addition to the production of harm by-products. The influence of the applied voltage variation on the negative corona characteristics in a coaxial electrode geometry has been investigated based on one-dimensional dynamic model of corona discharge includes one-dimensional continuity equations and Poisson equation. The one-dimensional fluid model of corona discharge is solved by finite difference flux correction method (FD-FCT). The calculations were performed on oxygen gas under the atmospheric pressure using COMSOL multiphysics software. The corona discharge parameters are simulated under different voltage of 4kV, 6kV, 8kV and 10kV, respectively. The effect of the applied voltage on the spatial distribution of main charged species and electron as well as the ozone was considered. The results show that as the negative applied voltage on the cathode increased the total current density also increase while the electron density decrease. The ozone density do not much affected by the increasing the applied voltage.
Keywords
Negative Corona Discharge,,; ,،,؛ozone density,,; ,،,؛Negative applied voltage

Statistics Article View: 487 PDF Download: 357