DEVELOPMENT OF A MATHEMATICAL MODEL TO IMPROVE THE GAS DYNAMIC PROTECTION OF PLASMATRON CATHODE ASSEMBLIES

The article analyzes the main approaches to mathematical modeling of physical processes in plasma. It is proposed and develop a mathematical model based on the magnetogasdynamic approach to describe plasma. As a result of the comparative analysis of existing turbulence models and comparing the results of simulations with the works of other authors and the results of experiments, it has been chosen SAS - SST model of turbulence. The comparative analysis of the results of simulation of a free-flaming electric arc of atmospheric pressure has shown an acceptable quantitative and qualitative agreement of the obtained result with the experimental data. Tolerance was up to 6% for temperature values and up to 3% for maximum velocity values at arc axis.