Title of article :
Influence of the inlet gas velocity components on the survival of the vertex of gas in the plasma torch
Author/Authors :
Gharaeinia, M. Plasma Physics Research Center - Islamic Azad University Science and Research Branch, Tehran, Iran , Saviz, S. Plasma Physics Research Center - Islamic Azad University Science and Research Branch, Tehran, Iran , Sari, A. H. Plasma Physics Research Center - Islamic Azad University Science and Research Branch, Tehran, Iran
Abstract :
The vortex gas injection into plasma torch is considered as a method for reducing electrodes erosion. In order to investigate
the effects of vortex gas injection on plasma structure, as well as the effect of gas viscosity on the rate of rotation, a threedimensional
nonequilibrium and time-dependent non-transferred DC plasma torch model has been simulated. Viewing the
general characteristics of the plasma shows that the model works well. The results have shown that if the components of the
inlet gas velocity are not properly selected, it is possible that the rotary effects of the gas are greatly depleted even before
the gas reaches the cathode tip and plasma formation. In this case, only the change in the axial component of the gas causes
changes in the structure of the plasma. Vortex reduction is also observed during the movement of cold gases. It is observed
that the change in viscosity of gas has significant effects on the rate of the vortex.
Keywords :
Plasma torch , Thermal plasma , Swirl , Simulation
Journal title :
Journal of Theoretical and Applied Physics