The objective of this study is to analyze the arc properties during a stationary plasma arc welding operation while utilizing various plasma and shielding gas flows. COMSOL software was used to resolve multiphysics phenomena such as laminar flow, heat transport, and the electric and magnetic field. The procedure was validated using the temperature and velocity properties of the free-burning Gas Tungsten Arc Welding plasma under argon gas.
In this study, the greatest plasma speed and the temperature distribution computed numerically are compared with experimental results from the literature. Additionally, the numerically determined velocity profile is compared to another computational solution that was found in the literature. The comparisons showed that they were a good match. As for the results of the validated model: while the shielding gas flow rate does not affect the arc pressure, the arc pressure measured at the anode surface rises considerably with higher plasma gas flow rates. Changes in plasma gas flow do not appreciably affect arc voltage. On the other hand, shielding gas flow has a more noticeable impact on arc voltage. The plasma gas flow rate has a small effect on the arc velocity and the arc temperature. The shielding gas flow rate does not affect the arc velocity and the arc temperature significantly.
ORCID NO: 0000-0001-6900-3259
Keywords: Plasma Arc Welding, Finite Element Method, Arc Parameters