Radiative Heat Transfer in Thermal Plasmas

conference paper

English

Radiation emission and absorption in thermal arc plasmas are important energy transfer processes. Exact calculations, though possible in principle, are usually impossible in practice because of the need to treat a large number of spectral lines and also the continuum radiation in the whole spectrum range. So far, we have used an approximate method of partial characteristics to evaluate the radiation intensities, radiation fluxes and the divergence of radiation fluxes for arc plasmas of SF6, PTFE, Ar, H2O, and their mixtures. In this paper, we have extended our calculations to arc plasma of air at the plasma temperatures in the range of 300-35000 K and pressures from 1 to 10 bars. We have calculated the coefficients of absorption for air plasmas at different temperatures, and have used these coefficients to calculate the partial characteristics. Both the continuum and the line spectra of atoms, together with molecular band contributions have been included in calculations. The method of partial characteristics has been applied to 3D calculations of radiative heat transfer for cylindrical arc plasma in simplified temperature profiles. Conclusions have been made concerning validity and utilization of the method of partial characteristics in general gas dynamics problems.

thermal plasmas, air, partial characteristics

AUBRECHT, V.; BARTLOVÁ, M.

2007

2. 7. 2007

Prirodovedec No. 235

Nitra

978-80-8094-084-3

Proceedings of CoPhys - International Physics Workshop 2006

71

76

6