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FEM simulation of two- and three-electrode spark gap discharges

Khorasani, S ; Sharif University of Technology | 2002

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  1. Type of Document: Article
  2. Publisher: Sharif University of Technology , 2002
  3. Abstract:
  4. The discharge process in two- and three-electrode pure-nitrogen spark gaps is simulated using Finite Element Method (FEM) to solve for the electric potential and field. The effects of secondary electron emission, photo-ionization and recombination mechanisms are taken into account. Current growth and the evolution of ion and electron distributions in the discharges are studied and an oscillation due to cathode streamer movements has been observed, in agreement with the theoretically estimated values. The study of complete discharges has been possible by introducing proper absorbing boundary conditions over the electrodes, by which numerical instabilities have been suppressed. The simulation results for different values of applied voltage, pressure, gap distance, series resistance and series inductance are discussed. In the case of three-electrode spark gaps, the effect of the trigger voltage on the current buildup speed is considered. Agreement between the calculated closing time for the two-electrode spark gap and a reported empirical formula is observed
  5. Keywords:
  7. Source: Scientia Iranica ; Volume 9, Issue 2 , 2002 , Pages 116-124 ; 10263098 (ISSN)
  8. URL: https://www.sid.ir/paper/289430/en