Treatment of Near-electrode Regions in a Simple Model of Blasted Electric Arc

The paper deals with near-electrode regions of electric arc burning in argon in an arc heater. The arc behavior is described by a mathematical model using the gas transport and thermodynamic properties and real experimental data. The near-electrode regions obey different rules than the intensively blasted arc column alone, but the integral measured data include both of them. For modelling the arc, the near-electrode regions have been previously neglected or described using the data taken from other authors who investigated just the near-electrode phenomena. Now, the influence of near-electrodes regions is tried to be excluded by procedures based just on the measured data. The obtained results are shown in comparison with the data given by other authors.