The Paton Welding Journal, 2005, №06

2005 №06 (01)

2005 №06 (03)

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The Paton Welding Journal, 2005, #6, 6-10 pages

Convective-conductive and radiation heat exchange of plasma flow with particles of dispersed materials in plasma spraying

Yu.S. Borisov, A.S. Zatserkovny, I.V. Krivtsun

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Physical processes are described, which determine the thermal impact of the plasma Jet on dispersed material particles in plasma spraying of coatings. Various criterial dependencies are analysed, which are used for calculation of the convective-conductive component of the heat flow through the surface of a spherical particle in the flow of a low-tem¬perature plasma at atmospheric pressure. A procedure is proposed for calculation of characteristics of radiation heat exchange of dense plasma with the metal particle surface. Numerical analysis of the considered components of the heat flow into a particle has been conducted in a broad range of parameters of a non-disturbed plasma flow (argon plasma) and temperature of the particle (aluminium) surface. It is shown that the radiation heat exchange has a significant influence on the resulting heat flow through the surface of a spraying particle.
Keywords: plasma spraying, dispersed material, particle, plasma jet, plasma, heat exchange, heat flow, radiation

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Suggested Citation

Yu.S. Borisov, A.S. Zatserkovny, I.V. Krivtsun (2005) Convective-conductive and radiation heat exchange of plasma flow with particles of dispersed materials in plasma spraying. The Paton Welding J., 06, 6-10.

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