Nozzle Spraying Model of Combustion Thermal Spray

Abstract:

The flame used in combustion flame spraying is typical of a high-temperature free jet. The flow fields of free jets are multi-phase flows that couple the mass and heat transfer. The analytical and numerical solutions to turbulent flows are engineering approximations. This work uses Prandtle’s mixing-length theory to describe the flame spreading of free combustion spray jet and uses nozzle spray model to describe the distribution of the powder particles sprayed from powder nozzle to the substrate surface. The nozzle geometry and the parameters determine the distribution of the powder particles. The nozzle spray model has the same physical meaning with the jet spreading angle. Experimental measurements were carried by a high-speed CCD camera.

• Periodical: Advanced Materials Research (Volumes 655-657)
• Pages: 211-217
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.655-657.211
• Online since: January 2013
• Authors: Wen Liang Guo, Zheng Guo
• Keywords: Combustion Thermal Spray Jet, Nozzle Spray Model, Spreading Angle

References

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[2] Computational Dynamics Limited: STAR-CD Manu(2003), version 3. 05.

[3] Wenliang Guo: Computational Modelling of the Combustion Spray Process(D). UK: London South Bank University(2009).