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Thermal models of a flame arrester.

Authors
Edwards-JC
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9378, 1991 Jan; :1-23
Link
NIOSHTIC No.
10010782
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 an equilibrium model and 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 maximum outside surface temperature of the arrester showed an approximate agreement with measured values for vent-area-to-enclosure-volume ratios between 12 and 28 in2.Ft-3.
Keywords
Mathematical-models; Explosions; Safety-engineering; Mine-fires; Flame-propagation
Publication Date
19910101
Document Type
IH; Report of Investigations
Fiscal Year
1991
NTIS Accession No.
PB92110915
NTIS Price
A03
Identifying No.
RI-9378
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9378
State
PA
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