Detail publikace

Spectral and spatial characteristic behaviour of three-dimensional radiation transfer in SF6 switching arcs

ESMAEILI, S. KLOC, P. YAN, J.

Originální název

Spectral and spatial characteristic behaviour of three-dimensional radiation transfer in SF6 switching arcs

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The spectral and spatial characteristics of three-dimensional radiation transfer across an arc column of 0.08 m long, typical in high-voltage gas blast circuit breakers, has been studied in detail. The arc column under study corresponds to an instantaneous current of 15 kA in SF6 gas at a pressure of 10 bar. Our results show that to calculate the radiative flux divergence (as a volumetric energy source), only a segment of the arc column of 0.024 m in thickness needs to be considered to attain an accuracy of better than 90%. Photons with a frequency lower than 2 x 10(15) Hz (150 nm in wavelength) can travel a considerable distance (>0.02 m) with an intensity attenuation factor of 0.2-0.8. Above 2 x 10(15) Hz, only photons from the continuum spectrum can travel up to 0.015 m and line emission is absorbed within a distance of typically 0.0005 m, i.e. the arcing gas is optically thick to these photons. The gas within a cross-section of the arc column can be divided into a net emission core and a net absorption zone. The 55%-75% of the radiation emitted from the core is reabsorbed. The starting position of the net absorption zone sits within the temperature interval of 75%-80% of the maximum temperature on the axis. The quantitative information from this work is expected to serve as baseline data for developing improved approximate models for radiation transfer calculation in SF6 switching arcs.

Klíčová slova

thermal radiation transfer; high-voltage arcs; discrete ordinated method (DOM); optical depth; radiation flux divergence; spectral and spatial distributions of the radiation; 3D simulation

Autoři

ESMAEILI, S.; KLOC, P.; YAN, J.

Vydáno

10. 2. 2022

Nakladatel

IOP Publishing Ltd

Místo

BRISTOL

ISSN

0022-3727

Periodikum

Journal of Physics D: Applied Physics

Ročník

55

Číslo

18

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

15

Strany počet

15

URL

https://iopscience.iop.org/article/10.1088/1361-6463/ac4f94

BibTex

@article{BUT179891,
  author="Saro {Esmaeili} and Petr {Kloc} and Jiudun {Yan}",
  title="Spectral and spatial characteristic behaviour of three-dimensional radiation transfer in SF6 switching arcs",
  journal="Journal of Physics D: Applied Physics",
  year="2022",
  volume="55",
  number="18",
  pages="1--15",
  doi="10.1088/1361-6463/ac4f94",
  issn="0022-3727",
  url="https://iopscience.iop.org/article/10.1088/1361-6463/ac4f94"
}