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Cylindrical Duct Fire Spread.

Authors
Edwards-JC; Perlee-HE; Chaiken-RF
Source
NTIS: PB 276 118 :32 pages
Link
NIOSHTIC No.
10007824
Abstract
A two-dimensional, time-dependent, mathematical model has been developed that describes fire spread along the walls of a ventilated duct. The model is based on the assumption that the leading edge of the fire zone propagating along the wall surface coincides with the isotherm for the fuel ignition temperature. The model includes gas- phase energy transport via radiation and forced convection inside the duct and solid-phase energy transport by conduction into the fuel lining. Product gases emitted from the fire zone are assumed to mix uniformly with the ventilation gas to produce an optically dense gas mixture at the combustion temperature that enters the preheat region. Numerical solutions of the model equations for a coal-lined duct (simulated coal mine entry) have been used to investigate the effects of tube radius, air velocity, combustion temperature, and optical density of the soot-laden gas upon the terminal fire spread rate.
Publication Date
19770101
Document Type
IH; Report of Investigation;
Fiscal Year
1977
NTIS Accession No.
PB-276118
NTIS Price
A04
Identifying No.
RI 8258
NIOSH Division
PRC;
Source Name
NTIS: PB 276 118
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