Optimization of a Rotating Twin Wire-Arc Spray Gun |
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Authors: | Rodolphe Bolot Hanlin Liao Crisalia Mateus Christian Coddet Jean-Michel Bordes |
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Affiliation: | 1. LERMPS, University of Technology of Belfort-Montbéliard, Site de Sévenans, Belfort, 90010, France 2. PSA Peugeot Citro?n, Belchamp Technical Center, Voujeaucourt, France
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Abstract: | This paper presents a CFD (Computational Fluid Dynamic) study and experimental results concerning a rotating twin wire-arc
spray process for the production of coatings on engine cylinder bores. In this process, the wire atomization is performed
using a gas injection coaxially with the cylinder axis. The thermal spray tool is equipped with a deviation head rotating
around the cylinder axis and allowing deflecting the droplet spray perpendicularly to the cylinder surface. The initial deviation
head was found to be not sufficiently efficient so that a new deviation head incorporating an inclined slot was designed and
used. Both CFD results and experiments showed that this new deviation head is more efficient. Moreover, it allowed increasing
the coating bond-strength up to the specifications imposed by PSA Peugeot-Citroen. The present article shows that the wire-arc
spray technology may replace efficiently the Atmospheric Plasma Spray (APS) for the thermal spray of coatings on engine cylinder
bores. Moreover, it shows how CFD may help in solving industrial problems. In particular, the FLUENT CFD code was used in
order to perform improvements of the deviation head design.
This article was originally published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain
Montavon, Ed., ASM International, Materials Park, 2007. |
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Keywords: | computational fluid dynamics internal thermal spray twin wire-arc |
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