BAND MODELS FOR RADIATIVE TRANSFER IN NON-LTE DIATOMIC MOLECULES OF CO2-N2 PLASMAS

摘要

A statistical narrow-band model is developed for the optically non-thin electronic systems of carbonaceous molecules in CO_2-N_2 plasmas and its accuracy is studied under equilibrium and non-equilibrium conditions. Line by line calculations are used to produce curves of growth of transmissivities from which band model parameters are calculated by least-square adjustments. The model is shown to provide quite accurate description of radiative properties and radiative intensities for Doppler, Lorentz, and Voigt line profiles, and for both local thermody-namic equilibrium and a multi-temperature description of the gas mixture thermodynamic state. The model is also suitable for a more general description of the gas thermodynamic state where the electronic state populations are arbitrary.