Radiative heat transfer in plasma of pulsed high pressure caesium discharge

7th Conference on Low temperature Plasma in the Processes of Functional Coating Preparation

Lapshin, V.F.^1

Department of Physics, St. Petersburg State Transport University, Moskovsky 9, St. Petersburg

190031, Russia^1

关键词: Discharge plasma;    Electric energies;    Emission point;    Low pressures;    Optical thickness;    Plasma volume;    Radial profiles;    Radiative heat transfer;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/669/1/012035/pdf
DOI  :  10.1088/1742-6596/669/1/012035

来源: IOP

【 摘 要 】

Two-temperature many component gas dynamic model is used for the analysis of features of radiative heat transfer in pulsed high pressure caesium discharge plasma. It is shown that at a sufficiently high pressure the radial optical thickness of arc column is close to unit (τR(λ) ∼ 1) in most part of spectrum. In this case radiative heat transfer has not local character. In these conditions the photons which are emitted in any point of plasma volume are absorbed in other point remote from an emission point on considerable distance. As a result, the most part of the electric energy put in the discharge mainly near its axis is almost instantly redistributed on all volume of discharge column. In such discharge radial profiles of temperature are smooth. In case of low pressure, when discharge plasma is optically transparent for own radiation in the most part of a spectrum (τR(λ)