Abstract
A one-dimensional, axisymmetric, Monte Carlo radiative transfer method has been developed to calculate the energy transfer and temperature profiles of moderate to high pressure cylindrical electric arc columns. The model includes the energy transfer due to the emission and absorption of a non-gray gas and thermal conduction but neglects convection. The thermal and electrical conductivities and the wavelength dependent spectral absorptivities are calculated based on assumption of local thermodynamical equilibrium (LTE). To verify the method, calculations were performed for the case of an electric arc in air at 30 atm pressure. The results were compared to those obtained from an earlier calculation which used the diffusion approximation for the radiative transfer. This case is representative of conditions that are typical of constrictors in arc heaters. The method was then applied to an arc in NH 3 at 1 atm for conditions that are typical of the constrictor in arcjet thrusters. The geometrical part of the method was then extended to enable a fully two-dimensional, axisymmetric simulation of radiative transfer for generic geometrical shapes.
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