Radiative Heating of Inside Surface of Hydrogen and Air Plasma Generator

A non-stationary gas-dynamic model of a flow of the viscous heat-conducting radiating gas through the localized area of plasma in the laser plasma generator is given. The model is based on the Navier-Stokes equations, an energy conservation equation for the chemically balanced heat-conducting gas and a radiation transfer equation in multi-group spectral approximation. As plasma-creating gases, air and hydrogen are investigated at atmospheric pressure. A numerical calculation of radiative heating of the inside surface of the laser plasma generator is conducted. Group and integral radiative heat fluxes to the inside surface of the cylindrical laser plasma generator have been calculated with the help of P₁-approximation of the method of spherical harmonics, the method of discrete directions and method of discrete ordinates. A comparison of numerical results is presented.