Numerical characterization of the plasma arc with various Ar-CO2 mixtures

Environmental Science and Pollution Research International
Abiyazhini RajendranBalasubramanian Chidambara Thanupillai

Abstract

Plasma technology finds applications in many industrial areas. To improve the process efficiency, different plasma forming gases and their mixtures are used. Since CO2 is economical and has high thermal conductivity, it is identified as a potential candidate in plasma material processing. However, the characteristics and merits of CO2 plasma arc in material processing are scanty. In this work, a 2D model is built to simulate plasma arc with CO2 and its mixtures with Ar. Effects of arc current, gas composition and arc length on the arc heating efficiency and arc characteristics are discussed. The arc size is strongly influenced by the gas composition at 200 A than at 100 A. Temperature distribution in the arcs is wider when CO2 content is decreased. The effect of arc current on the arc heating efficiency is stronger at lower current. Results predicted by the present model are compared with measured data for model validation.

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