Heat Transfer in the Solid Cathode of a Hollow Cathode Plasma Torch

Authors

  • A. Monnoyer Laboratoire Plasma et Conversion d’Energie, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, 31062 Toulouse CEDEX, France
  • P. Freton Laboratoire Plasma et Conversion d’Energie, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, 31062 Toulouse CEDEX, France
  • J.-J. Gonzalez Laboratoire Plasma et Conversion d’Energie, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, 31062 Toulouse CEDEX, France

DOI:

https://doi.org/10.14311/ppt.2023.2.94

Keywords:

plasma torch, sheath model, cold cathode, heat conduction

Abstract

After recalling the working principle of hollow cathode plasma torches, we evaluate the heat flux profile on the cathodic arc root. This evaluation takes into account the physics of the cathode sheath. Particular attention is devoted to electron emission from the cold copper cathode. This heat flux profile is then used as a moving boundary condition to obtain the temperature field in the solid cathode with a heat conduction study, with the aim of discussing the problem of its erosion.

References

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Published

2023-08-31

Issue

Vol. 10 No. 2 (2023)

Section

Articles

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Copyright (c) 2023 A. Monnoyer, P. Freton, J.-J. Gonzalez

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