Article ID Journal Published Year Pages File Type
1239994 Spectrochimica Acta Part B: Atomic Spectroscopy 2013 13 Pages PDF
Abstract

•We review our recent efforts in modeling of H2/H plasmas.•We stress the couplings between state-to-state chemical kinetics, electron kinetics and radiation.•These issues are illustrated using a 0-d and 1-d models.•The effect of radiation transfer on chemical kinetics is considered.

Some of the recent efforts in the state-to-state modeling of H/H2-based plasma are considered, with particular concern to the aspects of self-consistent coupling between the chemical kinetics, electron kinetics and radiation. These aspects are first illustrated in the case of a 0-dimensional model considering both optically thin and optically thick cases in recombining and ionizing regimes. In the second part of the paper, a 1-dimensional extension of the model is applied to study a steady normal shock generated in an H2/He plasma of interest in atmospheric entry problems. A radiation transfer equation is coupled to the model as well, to analyze the effect of radiation transfer on chemical kinetics and compare to the commonly used thin and thick plasma approximations. The most significant result is the influence of reabsorption on the concentration of excited states, which in turn creates additional structure on the electron energy distribution function through second kind collisions.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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