Heat transfer and plasmatron electrode erosion

  • A. Marotta
  • L. I. Sharakhovsky
  • V. N. Borisyuk
Article
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Abstract

A simple thermophysical model is proposed for cold electrode erosion in electric-arc heaters. The model regards erosion as characterized by an effective enthalpy for the change of state of the electrode material in the arc spot from solid to plasma. We show that the erosion problem can be represented by a system of three one-dimensional equations. The total heat flux in the arc spot can be represented by the electrode voltage drop. A magnetically driven arc rotating between copper ring electrodes was used for the experiments. The present model enables us to reveal the relative significance of the different parameters in the erosion process and to predict the erosion behavior in cold-electrode electric-arc heaters over a wide range of parameters.

Keywords

Fusion Zone Total Heat Flux Electrode Erosion Cathode Erosion Specific Erosion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Plenum Publishing Corporation 1997

Authors and Affiliations

  • A. Marotta
    • 1
  • L. I. Sharakhovsky
    • 1
  • V. N. Borisyuk
    • 2
  1. 1.Instituto de Fisica “Gleb Wataghin≓Universidade Estadual de CampinasSab PauloBrasil
  2. 2.Luikov Heat and Mass Transfer InstituteMinskBelarus

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