古希腊的神话与宗教.pdf.pdf

Hindawi Publishing CorporationAdvances in Materials Science and EngineeringVolume 2011, Article ID615492,6pagesdoi: ArticleExperimental Study of Heat Flux Distribution of Arc Driven ic FieldNaomi Matsumoto, Takeo Yamamoto, Masaya Sugimoto, and Koichi TakedaDepartment of Machine Intelligence and SystemEngineering, Akita Prefectural University, Yurihonjo 015-0055, JapanCorrespondence should be addressed to Masaya Sugimoto,******@akita- 3 December 2010; Accepted 21 February 2011Academic Editor: Pavel LejcekCopyright ? 2011 Naomi Matsumoto et al. This is an open access article distributed under the mons AttributionLicense, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is authors earlier developed a model to predict the heat ?ux distribution inanarc driven by ic ?eld. That theoreticalmodel implied that the heat ?ux distribution depended on waveforms of the imposed AC ic ?eld. Experiments wereconducted in this study to validate that theoretical prediction. Theoretical calculations of heat ?ux distribution in the arc driven byAC ic ?eld were conducted using the heat ?ux pro?le in the arc root obtained from the measurement under no ic?eld. The heat ?ux distributions in arcs driven by AC ic ?elds were measured by imposing two AC ic ?elds withsinusoidal and rectangular waveforms. Agreement between experimental and theoretical heat ?ux distributions was good. Resultscon?rmthat heat ?ux pro?les of various types are producible by controlling the imposed ic ?ux density and its . IntroductionBecause of intense heat ?ow at a small arc root, transferredarcs have been widely used for cutting and welding of , conventional arcs remain inconvenient for heatingand melting over a wide area. Many attempts have been madeto expand arc roots using external ic ?elds [1,2].Take da [3] developed a ically driven arc by imposingan alternating ic ?eld per