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Computing anode heating voltage in high-pressure arc discharges and modelling rod electrodes in dc and ac regimes

2017Journal article Restricted access
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dc.contributor.authorAlmeida, N. A.
dc.contributor.authorCunha, M. D.
dc.contributor.authorBenilov, M. S.
dc.date.accessioned2019-11-12T11:42:24Z
dc.date.available2019-11-12T11:42:24Z
dc.date.issued2017
dc.description.abstractNumerical modelling of near-anode layers in arc discharges in several gases (Ar, Xe and Hg) is performed in a wide range of current densities, anode surface temperatures, and plasma pressures. It is shown that the density of energy flux to the anode is only weakly affected by the anode surface temperature and varies linearly with the current density. This allows one to interpret the results in terms of anode heating voltage (volt equivalent of the heat flux to the anode). The computed data may be useful in different ways. An example considered in this work concerns the evaluation of thermal regime of anodes in the shape of a thin rod operating in the diffuse mode. Invoking the model of nonlinear surface heating for cathodes, one obtains a simple and free of empirical parameters model of thin rod electrodes applicable to dc and ac high-pressure arcs provided that no anode spots are present. The model is applied to a variety of experiments reported in the literature and a good agreement with the experimental data found.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAlmeida, N. A., Cunha, M. D., & Benilov, M. S. (2017). Computing anode heating voltage in high-pressure arc discharges and modelling rod electrodes in dc and ac regimes. Journal of Physics D: Applied Physics, 50(38), 385203.pt_PT
dc.identifier.doi10.1088/1361-6463/aa7f97pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/2600
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishingpt_PT
dc.relationPest-OE/UID/FIS/50010/2013pt_PT
dc.subjectHigh-pressure arc dischargespt_PT
dc.subjectNear-electrode phenomenapt_PT
dc.subjectArc-electrode interactionpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleComputing anode heating voltage in high-pressure arc discharges and modelling rod electrodes in dc and ac regimespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage385203pt_PT
oaire.citation.titleJournal of Physics D: Applied Physicspt_PT
oaire.citation.volume50(38)pt_PT
person.familyNameAlmeida
person.familyNameCunha
person.familyNameBenilov
person.givenNameNelson
person.givenNameMário
person.givenNameMikhail
person.identifier.ciencia-id0516-6FAA-27E2
person.identifier.ciencia-id0F14-A79A-97C1
person.identifier.orcid0000-0002-6499-3609
person.identifier.orcid0000-0002-0397-536X
person.identifier.orcid0000-0001-9059-1948
person.identifier.ridM-6228-2013
person.identifier.ridK-4443-2015
person.identifier.scopus-author-id7003469070
person.identifier.scopus-author-id7102711276
person.identifier.scopus-author-id7005138676
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication9a82798a-90e3-41c4-a9dd-7974813221a8
relation.isAuthorOfPublication8509472b-5d78-47db-bfa0-51625a4e9218
relation.isAuthorOfPublication5ccf95a3-53d5-446c-857c-55d64b887175
relation.isAuthorOfPublication.latestForDiscovery8509472b-5d78-47db-bfa0-51625a4e9218

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