Computational simulation of liquid-fuelled HVOF thermal spraying
Computational simulation of liquid-fuelled HVOF thermal spraying
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.
jp-5000, hvof, kerosene, cfd, gas dynamics, convergent–divergent nozzle
676-684
Gu, Sai
a6f7af91-4731-46fe-ac4d-3081890ab704
Tabbara, Hani
005dd3f8-eeb2-4698-ad5d-3dbd699084a7
15 December 2009
Gu, Sai
a6f7af91-4731-46fe-ac4d-3081890ab704
Tabbara, Hani
005dd3f8-eeb2-4698-ad5d-3dbd699084a7
Gu, Sai and Tabbara, Hani
(2009)
Computational simulation of liquid-fuelled HVOF thermal spraying.
Surface and Coatings Technology, 204 (5), .
(doi:10.1016/j.surfcoat.2009.09.005).
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.
More information
Published date: 15 December 2009
Keywords:
jp-5000, hvof, kerosene, cfd, gas dynamics, convergent–divergent nozzle
Identifiers
Local EPrints ID: 149239
URI: http://eprints.soton.ac.uk/id/eprint/149239
ISSN: 0257-8972
PURE UUID: 5089835e-1275-4d3f-8516-f506436f9882
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Date deposited: 06 May 2010 08:27
Last modified: 14 Mar 2024 01:05
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Contributors
Author:
Sai Gu
Author:
Hani Tabbara
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