Publication detail

Radiative Heat Transfer in Thermal Plasmas

AUBRECHT, V. BARTLOVÁ, M.

Original Title

Radiative Heat Transfer in Thermal Plasmas

English Title

Radiative Heat Transfer in Thermal Plasmas

Type

conference paper

Language

en

Original Abstract

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.

English abstract

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.

Keywords

thermal plasmas, air, partial characteristics

RIV year

2007

Released

02.07.2007

Publisher

Prirodovedec No. 235

Location

Nitra

ISBN

978-80-8094-084-3

Book

Proceedings of CoPhys - International Physics Workshop 2006

Pages from

71

Pages to

76

Pages count

6

BibTex


@inproceedings{BUT23008,
  author="Vladimír {Aubrecht} and Milada {Bartlová}",
  title="Radiative Heat Transfer in Thermal Plasmas",
  annote="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.",
  address="Prirodovedec No. 235",
  booktitle="Proceedings of CoPhys - International Physics Workshop 2006",
  chapter="23008",
  howpublished="print",
  institution="Prirodovedec No. 235",
  year="2007",
  month="july",
  pages="71--76",
  publisher="Prirodovedec No. 235",
  type="conference paper"
}