Effects of carrier gas flow on particle in-flight characteristics during the plasma spray process with external injection

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Conference paper | Microstructure | Berndt, Christopher C.

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41739

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Title: Effects of carrier gas flow on particle in-flight characteristics during the plasma spray process with external injection
Author(s): Remesh, K.; Yu, S. C. M.; Ng, Hong Wah; Lam, Yee Cheong; Berndt, Christopher C.
Abstract: Three-dimensional numerical analysis was carried out on particle interactions within the DC plasma spray process. The plasma spray process was modeled as a jet issuing from the torch nozzle by the heating of the arc gas by an electric arc within the nozzle. Partially stabilized zirconia (PSZ) was injected into the jet with a N2 carrier gas. The plasma was modeled as a continuum compressible fluid with temperature dependent thermodynamic properties. Particles were modeled by the stochastic discrete particle model. Jet turbulence was modeled using the standard k-ε model. The particle performance inside the plasma plume at various standoff distances is reported. The results show that the variation of carrier gas flow rate altered the particle behavior by reduction in plasma temperature and velocity. Also Particle trajectory is changed by the variation of carrier gas flow rate influencing the particle in-flight characteristics. Hence, it would be expected to influence the deposition process.
Publication type: Conference paper
Source: Proceedings of the 2001 National Heat Transfer Conference (NHTC2001), Anaheim, California, United States, 10-12 June 2001, Vol. 1, pp. 467-474
Publication year: 2001
Keyword(s): CFD; Computational fluid dynamics; DC plasma spray; Electric arcs; Evaporation; Flow of fluids; Heating; Jets; Mathematical models; Melting; Microstructure; Partially stabilised zirconia; Particle beam injection; Particle trajectory; Plasma plumes; Plasma spraying; PSZ; Stochastic discrete particle model; Thermodynamic properties; Zirconia
Publisher: American Society of Mechanical Engineers
ISBN: 9780791835333, 0791835332
Copyright: Copyright © 2001 (Please consult authors). Publisher does not officially support author/institution self-archiving of either the postprint (final, revised accepted draft) or published version of full text.
Peer reviewed