Publication de 4 numéros par an
ISSN Imprimer: 1093-3611
ISSN En ligne: 1940-4360
Indexed in
COLD ELECTRODE EROSION MODEL FOR UNSTEADY ARC SPOTS
RÉSUMÉ
The step-wise model of displacement of the arc spot in cold electrode arc heaters is considered in this report. We have shown theoretically that the nature of the motion of the arc spot substantially influences the erosion: the step-wise motion of the spot leads to the increase in the erosion in comparison with the continuous motion, the greater it is, the greater the length of the arc step. We compared both models to the same experimental results for copper cathode in air. The step-wise model shows somewhat better agreement to our experimental erosion data, than the continuous one. In order to access the validity of the step-wise model we used results for electric discharge machining experiments. A good agreement was also obtained.
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Marotta, A. and Sharakhovsky, L. I. , A theoretical and experimental investigation of copper electrode erosion in electric arc heaters. I: The thermophysical model.
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Sharakhovsky, L. I., Marotta, A., and Borisyuk, V. N. , A theoretical and experimental investigation of copper electrode erosion in electric arc heaters, III: Experimental validation and prediction of erosion.
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Sharakhovsky, L. I., Marotta, A., and Borisyuk, V. N. , A theoretical and experimental investigation of copper electrode erosion in electric arc heaters, II: Experimental determination of arc spot parameters.
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DiBitonto, D. D., Eubank, P. T., Patel, M. R., and Barrufet, M. A. , Theoretical models of the electrical discharge machining process, I. A simple cathode erosion model.
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Yuan Jie, Long Yongsheng, Zhu Tao, Liu Yuan, Yin Dongdi, Yang Bin, Copper Cathode’s Ablated Structure Operated in a 50 Megawatt Arc Heater, Journal of Thermophysics and Heat Transfer, 33, 4, 2019. Crossref