Radiation transfer in a real spectrum. Integration over frequency

Sevast'yanenko, V. G.

doi:10.1007/bf00865111

Cited by 34 publications

(8 citation statements)

References 5 publications

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“…Due to the non-linearity of equations describing the radiation field and strong dependence of input parameters on the radiation frequency, various approximate methods are used. One of them is the method of spherical harmonics -P N -approximation [3][4][5][6].…”

Section: Energy Balance Of Arc Plasmamentioning

confidence: 99%

Radiation Transfer in Arc Plasmas

Bogatyreva

Bartlova

Aubrecht

et al. 2017

PPT

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Section: Energy Balance Of Arc Plasmamentioning

confidence: 99%

Radiation Transfer in Arc Plasmas

Bogatyreva

Bartlova

Aubrecht

et al. 2017

PPT

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“…The principle of the method is that the calculation of integrals over radiation frequencies in equations for radiation quantities is performed in advance to form functions Som and ∆ Sim, called partial characteristics (16)(17) . Partial characteristics include all time demanding integrations over frequencies.…”

Section: Physical Modelmentioning

confidence: 99%

The Influence of Turbulence on Characteristics of a Hybrid-Stabilized Argon-Water Electric Arc

Jenista

Takana

Nishiyama

et al. 2013

JTST

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The paper presents numerical simulations of the discharge and near outlet regions of the hybrid-stabilized argon-water electric arc. Calculations were carried out for the assumption of laminar and turbulent plasma flow models, respectively. Results of calculations for currents 300-600 A show that the influence of turbulence is weak and the maximum difference for all the monitored physical quantities is less than 10%. Comparison with available experiments exhibits good agreement.

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“…In our recent papers [3,4], we have used the approximate method of partial characteristics as formulated by Sevast'yanenko [5] for prediction of radiation intensities, radiation fluxes and the divergence of radiation fluxes for various temperature profiles of SF 6 arc plasmas. In this paper we applied the same method to the electric arc plasma in argon.…”

Section: Coefficients Of Absorptionmentioning

confidence: 99%

Calculation of radiative heat transfer in argon arc plasmas

Aubrecht

Bartlova

2000

Czech. J. Phys.

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Radiation emission and absorption in 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. Recently, we have used an approximate method of partial characteristics to evaluate the radiation intensities, radiation fluxes and the divergence of radiation fluxes for SF6 arc plasma with cylindrical symmetry. In this paper, we have extended our calculations to argon arc plasmas for the plasma pressures of 0.1, 0.5 and 1.0 MPa. We have calculated the coefficients of absorption for Ar plasmas at temperatures from 300 to 35 000 K, and have used these coefficients to calculate the partial characteristics. Both the continuum and the line spectra have been included in calculations. We have taken into account the radiative photo-recombination and bremsstrahlung for the continuous spectrum, and over 500 spectral lines for the discrete spectra.The method of partial characteristics has been applied to three-dimensional calculations of radiative heat transfer -i.e. radiation intensity, radiation flux and its divergence -in simplified temperature profiles. Conclusions have been made concerning validity and utilization of the method of partial characteristics in general gas dynamics problems. Coefficients of absorptionPrediction of both radiation emission and absorption requires data of the continuum and the line spectra, respectively. The spectral coefficients of absorption (absorptivity) need to be calculated as a function of radiation frequency in the whole spectral range, from the infrared to the far ultraviolet region.Absorptivity is proportional to the concentration of the chemical species occurring in the plasma. In the present paper, the pure Ar plasma is assumed as a mixture of Ar atoms, Ar + , Ar ++ , Ar +++ , Ar ++++ ions and electrons, according to the Fig. 1. Concentrations of each species were taken from [1].Both line and continuum radiation were considered in calculations of absorption coefficients. Photorecombination radiation and 'bremsstrahlung' radiation contribute to the continuous spectrum. Semi-empirical formulae described in more detail in [2] were used for calculation of the continuum absorption coefficients.The absorptivity for each spectral line depends on the line shape. The fine multiplet structure and the lines overlapping should also be taken into account in

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Radiation transfer in a real spectrum. Integration over frequency

Cited by 34 publications

References 5 publications

Radiation Transfer in Arc Plasmas

Radiation Transfer in Arc Plasmas

The Influence of Turbulence on Characteristics of a Hybrid-Stabilized Argon-Water Electric Arc

Calculation of radiative heat transfer in argon arc plasmas

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