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Assessment of the Power Balance at a Copper Cathode Submitted to an Electric Arc by Surface Temperature Measurements and Numerical Modelling.

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Title: Assessment of the Power Balance at a Copper Cathode Submitted to an Electric Arc by Surface Temperature Measurements and Numerical Modelling.
Authors: Landfried, R.1, Leblanc, T.1, Kirkpatrick, M.2, Teste, Ph.1
Source: IEEE Transactions on Plasma Science. 4/1/2012, Vol. 40 Issue 4, p1205-1216. 12p.
Subjects: Electric properties, Copper, Surface temperature, Electric arc, Pyrometry, Temperature measurements, Atmospheric pressure measurement
Abstract: The aim of this work is to improve the understanding of the heating of copper cathodes under the action of a nonstationary electric arc in air. An experimental method is proposed for the measurement of the surface temperature distribution just after a very fast arc-controlled arc extinction. The arc current intensity is about 60–70 A, and the arc duration is in the range of 2.5–5 ms. Different kinds of surface temperature distributions have been observed depending on the arc root behavior. The measurement of the temperature decrease after the arc extinction was used to estimate the cathode surface temperature just at the moment of arc extinction. Two-dimensional thermal modeling taking into account phase changes is used to estimate the power balance at the cathode surface and to propose a second estimation of the surface temperature at the point of arc extinction. The comparisons between experimental results and thermal modeling lead in the present experimental conditions to a volt equivalent at the cathode in the range 6.7–10.7 V, to a surface power density in the range 0.6 \times 10^9 - 2.5 \times 10^9\ \W/m^2 and to a maximum surface temperature in the range 850 ^\circ\C –1300 ^\circ\C\ldots [ABSTRACT FROM AUTHOR]
Copyright of IEEE Transactions on Plasma Science is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Assessment of the Power Balance at a Copper Cathode Submitted to an Electric Arc by Surface Temperature Measurements and Numerical Modelling.
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  Data: <searchLink fieldCode="JN" term="%22IEEE+Transactions+on+Plasma+Science%22">IEEE Transactions on Plasma Science</searchLink>. 4/1/2012, Vol. 40 Issue 4, p1205-1216. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Electric+properties%22">Electric properties</searchLink><br /><searchLink fieldCode="DE" term="%22Copper%22">Copper</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+temperature%22">Surface temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+arc%22">Electric arc</searchLink><br /><searchLink fieldCode="DE" term="%22Pyrometry%22">Pyrometry</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+measurements%22">Temperature measurements</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+pressure+measurement%22">Atmospheric pressure measurement</searchLink>
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  Data: The aim of this work is to improve the understanding of the heating of copper cathodes under the action of a nonstationary electric arc in air. An experimental method is proposed for the measurement of the surface temperature distribution just after a very fast arc-controlled arc extinction. The arc current intensity is about 60–70 A, and the arc duration is in the range of 2.5–5 ms. Different kinds of surface temperature distributions have been observed depending on the arc root behavior. The measurement of the temperature decrease after the arc extinction was used to estimate the cathode surface temperature just at the moment of arc extinction. Two-dimensional thermal modeling taking into account phase changes is used to estimate the power balance at the cathode surface and to propose a second estimation of the surface temperature at the point of arc extinction. The comparisons between experimental results and thermal modeling lead in the present experimental conditions to a volt equivalent at the cathode in the range 6.7–10.7 V, to a surface power density in the range 0.6 \times 10^9 - 2.5 \times 10^9\ \W/m^2 and to a maximum surface temperature in the range 850 ^\circ\C –1300 ^\circ\C\ldots [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of IEEE Transactions on Plasma Science is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1109/TPS.2012.2185069
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 1205
    Subjects:
      – SubjectFull: Electric properties
        Type: general
      – SubjectFull: Copper
        Type: general
      – SubjectFull: Surface temperature
        Type: general
      – SubjectFull: Electric arc
        Type: general
      – SubjectFull: Pyrometry
        Type: general
      – SubjectFull: Temperature measurements
        Type: general
      – SubjectFull: Atmospheric pressure measurement
        Type: general
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      – TitleFull: Assessment of the Power Balance at a Copper Cathode Submitted to an Electric Arc by Surface Temperature Measurements and Numerical Modelling.
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            NameFull: Landfried, R.
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            NameFull: Leblanc, T.
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            NameFull: Kirkpatrick, M.
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            NameFull: Teste, Ph.
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            – D: 01
              M: 04
              Text: 4/1/2012
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              Y: 2012
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              Value: 40
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