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Thermal Models of a Flame Arrester.


PB92110915

Publication Date 1991
Personal Author Edwards, J. C.
Page Count 31
Abstract To increase the capability to predict the effectiveness of a flame arrester in the cooling of hot combustion gases expelled through a flame arrester, the U.S. Bureau of Mines developed one- and three-dimensional transient thermal models of a flame arrester, which were used to predict the temperature evolution within the arrester and the maximum temperature at the external surface of the arrester. The models account for convective and conductive heat transport within the arrester, and radiative losses at the exit surface. The gas flow through the arrester is established from an empirically derived relationship between the gas velocity and the pressure gradient across the arrester. Lateral heat loss from the arrester to the enclosure wall is accounted for in the three-dimensional model. The model calculations for the arrester maximum outside surface temperature showed an approximate agreement with measured values for vent area to enclosure volume ratios between 12 sq in/cu ft and 28 sq in/cu ft.
Keywords
  • Mine fires
  • Flame propagation
  • Mathematical models
  • Explosions
  • Safety engineering
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 48A - Mineral Industries
  • 94H - Industrial Safety Engineering
Corporate Authors Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes Library of Congress catalog card no. 91-10810.
Document Type Technical Report
Title Note Rept. of investigations/1991.
NTIS Issue Number 199203
Thermal Models of a Flame Arrester.
Thermal Models of a Flame Arrester.
PB92110915

  • Mine fires
  • Flame propagation
  • Mathematical models
  • Explosions
  • Safety engineering
  • Bureau of Mines
  • 48A - Mineral Industries
  • 94H - Industrial Safety Engineering
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