Etude des propriétés thermodynamique d’un arc électrique de découpe

Abstract

In this work we propose to study the distribution of thermal energy in arc plasmas in order to determine the temperature profiles. The plasma is assumed to be cylindrical and in thermodynamic equilibrium. The basic equations are the conservation equations of mass and energy. The numerical resolution of the system of equations obtained is carried out using a Runge-Kutta procedure. The data necessary for this modeling are the thermal and electrical conductivities and also the radiative power released from the plasma. The results obtained show that the radiative losses cause a cooling of the plasma. The radiation emitted by the plasma represents a non-negligible term in the energy balance, its effect is felt much on the temperature profile. The presence of hydrogen also influences the temperature profile of the CH4-H2 plasma.