Title: Computational fluid dynamic modelling of water-cooling mechanism during thermal spraying process

Authors: Spyros Kamnis, Sai Gu

Addresses: School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham B4 7ET, UK. ' School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham B4 7ET, UK

Abstract: A Computational Fluid Dynamic (CFD) model is developed to examine the heat transfer process through the water-cooling mechanism in a High Velocity Oxygen Fuel (HVOF) thermal spraying system. The water-cooling configuration is composed of a series of discrete holes through the copper-made thermal spraying gun. Unstructured grid is employed for both liquid and solid regions and the water-cooling model is fully integrated with the gas flow dynamics where combustion, turbulent flow and free jet expansion are included. The numerical results indicate that the water flow direction has noticeable influence on the cooling efficiency due to the variation of heat capacity of water and the current cooling mechanism has no noticeable effect on the gas flow dynamics within the thermal spraying gun.

Keywords: computational fluid dynamics; CFD; high velocity oxygen fuel; HVOF thermal spraying; water cooling; heat transfer; mathematical modelling; gas flow dynamics; combustion; turbulent flow; free jet expansion.

DOI: 10.1504/IJMIC.2007.014940

International Journal of Modelling, Identification and Control, 2007 Vol.2 No.3, pp.229 - 234

Available online: 20 Aug 2007 *

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