Ionization coefficient approach to modeling breakdown in nonuniform geometries. | Zendy

Larry K. Warne | Zendy; Roy Jorgenson | Zendy; S. Nicolaysen | Zendy

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Ionization coefficient approach to modeling breakdown in nonuniform geometries.

Author(s) -

Larry K. Warne,

Roy Jorgenson,

S. Nicolaysen

Publication year - 2003

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/918222

Subject(s) - ionization , monte carlo method , coaxial , plane (geometry) , impact ionization , computational physics , materials science , work (physics) , experimental data , surface (topology) , dielectric , mechanics , physics , geometry , engineering , mathematics , ion , electrical engineering , thermodynamics , statistics , quantum mechanics , optoelectronics

This report summarizes the work on breakdown modeling in nonuniform geometries by the ionization coefficient approach. Included are: (1) fits to primary and secondary ionization coefficients used in the modeling; (2) analytical test cases for sphere-to-sphere, wire-to-wire, corner, coaxial, and rod-to-plane geometries; a compilation of experimental data with source references; comparisons between code results, test case results, and experimental data. A simple criterion is proposed to differentiate between corona and spark. The effect of a dielectric surface on avalanche growth is examined by means of Monte Carlo simulations. The presence of a clean dry surface does not appear to enhance growth

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