Computational Simulation of Liquid Fuelled HVOF Thermal Spraying

Tabbara, H and Gu, S (2009) Computational Simulation of Liquid Fuelled HVOF Thermal Spraying Surface and Coatings Technology, 204 (5). pp. 676-684.

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Abstract

Liquid-fuelled high-velocity oxygen–fuel (HVOF) thermal spraying systems are gaining more attentions due to their advantage of producing denser coatings in comparison to their gas-fuelled counterparts. The flow through a HVOF gun is characterized by a complex array of thermodynamic phenomena involving combustion, turbulence and compressible flow. Advanced computational models have been developed to gain insight to the thermochemical processes of thermal spraying, however little work has been reported for the liquid-fuelled systems. This investigation employs a commercial finite volume CFD code to simulate the flow field through the most widely used liquid-fuel HVOF gun, JP5000 (Praxair, US). By combining numerical combustion and discrete phase models the turbulent spray flame is captured and the development of supersonic gas flow is revealed. The flow field is thoroughly examined by adjusting the nozzle throat diameter and combustion chamber size. The influence of fuel droplet size on the flame shame shape and combusting gas flow is also examined.

Item Type:	Article
Divisions :	Surrey research (other units)
Authors :	Tabbara, H and Gu, S
Date :	9 September 2009
DOI :	10.1016/j.surfcoat.2009.09.005
Copyright Disclaimer :	Copyright © 2016 Elsevier B.V. or its licensors or contributors.
Uncontrolled Keywords :	JP-5000, HVOF, Kerosene, CFD, Gas dynamics, Convergent–divergent nozzle
Depositing User :	Symplectic Elements
Date Deposited :	28 Mar 2017 10:59
Last Modified :	24 Jan 2020 12:51
URI:	http://epubs.surrey.ac.uk/id/eprint/810567

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