Numerical Study of Combination Parameters for Particle Impact Velocity and Temperature in Cold Spray |
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Authors: | H Katanoda M Fukuhara N Iino |
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Affiliation: | (1) Department of Mechanical Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan |
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Abstract: | Numerical simulations of gas/particle flows of cold spray are performed for N2 and He, respectively, to investigate the usefulness of the two material-independent combination parameters derived from the
equations of particle motion and temperature. The first combination parameter is the particle-diameter multiplied by the material
density, which governs the particle velocity. The second one is the squared particle-diameter multiplied by the material density
and specific heat, which affects the particle temperature. In the numerical simulation, the materials of the spray particle
selected are WC-12Co, Cu and Ti. The numerical results show that the maximum impact velocity of particle is obtained, when
the first combination parameter takes specific value regardless of the material type. Furthermore, it is shown that the particle
diameter and its temperature corresponding to the maximum impact velocity can be graphically estimated by using the two combination
parameters for any powder-materials normally used for the thermal spray.
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been
expanded from the original presentation. It is simultaneously 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, OH, 2007. |
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Keywords: | cold spray particle impact-velocity numerical simulation gasdynamics |
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