DC Arc Plasma Numerical Simulation Calculation Review

Abstract

This study established a three-dimensional numerical model based on the Fluent software, listing the commonly used boundary conditions, physical models, and basic assumptions in the process of DC arc plasma numerical simulation. By combining multiple literature analyses, the influence of working gas flow rate, working current magnitude, degree of gas swirl, and non-swirling gas on the internal physical fields of the DC arc plasma torch was investigated. The research results indicate that the temperature, current density, plasma flow velocity, and pressure inside the plasma torch all increase with the increase of the working gas flow rate and working current. Under the same operating conditions, an increase in the degree of gas swirl leads to a decrease in the temperature and current density inside the plasma torch. This study provides theoretical support for the design, optimization, and control of plasma torches, which is helpful in improving the thermal efficiency and application effects of plasma torches.