Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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NUMERICAL SIMULATION PARAMETERS HIGH JETS OF ARGON AT ITS EFFLUX THROUGH THE NOZZLE INTO THE PLASMA SPRAYING PROCESS

Boulichev V.V. 1 Shevelev D.V. 1 Korotkov V.V. 1
1 Bauman Moscow State Technical University (Kaluga Branch).
In this article developed and investigated a numerical model of the expiry of the high-temperature jet of argon through a nozzle and identified mechanisms of influence on the parameters of the nozzle of the gas stream. The adequacy of the estimated model is confirmed by comparing the simulation results with experimental data. It is shown that at the location of the nozzle end with an opening angle of 30 degrees and a length of 50 mm at a distance of 10 mm from the surface deposition occurs re- ejection of hot gas jet in the gap between the end of the nozzle and sprayed surface. Formed along the walls of the nozzle counter flow gas consisting of air as well as from a captured jet of hot gas raises the temperature of the gas jet and so to increase the volume fraction of argon in the nozzle cavity. The developed computational scheme can be used to analyze the effect of geometrical parameters cooled nozzles on the velocity and temperature distribution in high argon jets with respect to the processes of plasma spraying.