High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes) An International Journal

ISSN for PRINT: 1093-3611

For Online Access

Best Paper Award Selection - Editorial Board Site

2001, Volume5

Issue 1

140 pages

Issue price - $144.00

G. Mariaux
Laboratoire Sciences des Procédés Céramiques et de Traitements de Surface, ENSIL,16 rue d'Atlantis, 87068 LIMOGES Cedex, France

Pierre Fauchais
Laboratoire Sciences des Precedes Ceramiques et de Traitements de Surface, UMR 6638 CNRS-Universite de Limoges, faculte des Sciences et Technique, conventionne avec le CEA n° M08, France

Armelle Vardelle
University of Limoges, Laboratoire Sciences des Procédés Céramiques et de Traitements de Surface, ENSIL,16 rue d'Atlantis, 87068 LIMOGES Cedex, France

Bernard Pateyron
Laboratoire Sciences des Precedes Ceramiques et Traitements de Surfaces IJMR 6638, Universite de Limoges, 123 avenue Albert Thomas - 87060 Limoges, France

This paper presents a numerical simulation of the plasma-spraying of alumina particles. The first section deals with the coating formation. The latter is governed by various time-scales ranging between microseconds (splat flattening and solidification) and seconds (time between two passes). This large range makes the deposit process difficult to simulate. However, such simulations would help to have a better understanding of coating building and, therefore, a better control of coating quality. The second section addresses the modeling of the plasma jet and particle treatment using a three-dimensional commercial fluid dynamics code ESTET 3.4 The effect of (i) turbulence model and turbulence radial profiles at the torch exit on plasma flow and particle behavior, (ii) particle injection conditions on particle trajectories and heating and (iii) plasma jet fluctuations on temperature and velocity flow fields is investigated The comparison of predictions with experimental measurements of gas and particle velocity and temperature, makes it possible to determine the influential parameters and set them to pertinent values.

Download article, 25 pages

Article price - $35.00

<< Previous article   Next article >>