Diffuse and spot mode of cathode arc attachments in a at mospheric magnetically rotating argon arc

摘要

To understand the arc and thermal plasmas, a wide range of numerical simulations based n computational fluid dynamics coupled with electromagnetics have been carried out. Although the LTE models are proved successful to predict plasma temperature, deviations from LTE are experimentally observed, especially around the arc fringe. Furthermore, the interaction of plasma with cathode surface plays a key role in the whole discharge processe, . To research cathode discharge phenomena with a thermionic, a model including the cathode, the near-cathode layer and the arc column is needed.