A theoretical and experimental investigation of copper electrode erosion in electric arc heaters .2. The experimental determination of arc spot parameters

dc.creatorSharakhovsky, LI
dc.creatorMarotta, A
dc.creatorBorisyuk, VN
dc.date1997
dc.date44378
dc.date2014-12-16T11:35:05Z
dc.date2015-11-26T16:28:18Z
dc.date2014-12-16T11:35:05Z
dc.date2015-11-26T16:28:18Z
dc.date.accessioned2018-03-28T23:09:17Z
dc.date.available2018-03-28T23:09:17Z
dc.identifierJournal Of Physics D-applied Physics. Iop Publishing Ltd, v. 30, n. 14, n. 2018, n. 2025, 1997.
dc.identifier0022-3727
dc.identifierWOS:A1997XN10200009
dc.identifier10.1088/0022-3727/30/14/009
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53895
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/53895
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/53895
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1269425
dc.descriptionTwo important copper electrode parameters, namely, the volt-equivalent of the are spot heat flux and the are spot effective current density have been measured experimentally in magnetically driven arcs in air. The measurements were performed for currents in the range 0.025-1 kA, magnetic field strengths 0.133-0.95 T and air pressures 1-40 atm. The volt-equivalent of the are spot heat flux is proposed to account far the total heat flux entering the electrode surface through the are spot, An unsteady thermal method was applied in the measurements. To obtain the effective current density, the thermophysical experiment was combined with the application of equations of the erosion model presented in a previous companion paper. We show that the volt-equivalent of the cathode are spot heat flux increases with increasing magnetic field. The sum of the cathode and the anode voltage drops is shown to be approximately equal to the sum of the corresponding volt-equivalents of the are spot heat fluxes. Good agreement with the measurements of other authors is obtained. In particular, the effective are spot current density allows one to confirm the thermophysical model for the erosion of copper electrodes indirectly.
dc.description30
dc.description14
dc.description2018
dc.description2025
dc.languageen
dc.publisherIop Publishing Ltd
dc.publisherBristol
dc.publisherInglaterra
dc.relationJournal Of Physics D-applied Physics
dc.relationJ. Phys. D-Appl. Phys.
dc.rightsfechado
dc.rightshttp://iopscience.iop.org/page/copyright
dc.sourceWeb of Science
dc.subjectCathode
dc.titleA theoretical and experimental investigation of copper electrode erosion in electric arc heaters .2. The experimental determination of arc spot parameters
dc.typeArtículos de revistas


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