Three-Dimensional Numerical Analysis with P-1 Radiation Model in Low Voltage Switching Arc

Zhiqiang SUN  Mingzhe RONG  Yi WU  Jian LI  Fei YANG  

IEICE TRANSACTIONS on Electronics   Vol.E90-C    No.7    pp.1348-1355
Publication Date: 2007/07/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.7.1348
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006))
Category: Arc Discharge & Related Phenomena
P-1 radiation model,  switching arc,  arc voltage,  simulation,  

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This paper proposes the P-1 radiation model for the calculation of low voltage arc plasma. The influence of both emission and self-absorption are taken into account in this model. Based on the couple of electric field, magnetic field, flow field and thermal field, a three-dimensional arc chamber model is constructed and its radiation energy is calculated by the P-1 model with the spectrum divided into six bands. From the obtained distributions of temperature, incident radiation intensity, plasma velocity and current density by P-1 model, it is observed that temperature is obviously different from the result by net emission coefficient (NEC) method in the low temperature region. Arc column edges near the arc root also absorb radiation energy. Furthermore, compared with the result by NEC method, the arc column voltage calculated by P-1 model is lower and more close to the experimental result.