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Heat Transfer Research
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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v33.i7-8.70
8 pages

Influence of Radiative and Combined Heat Transfer on the Spread of Ground Fire

A. N. Subbotin
Toms State University, Tomsk, Russia

ABSTRACT

Ignition and burning of the combustible materials in a forest are discussed. The ignition is initiated by a plane fire source and then the physical processes occurring as a result of propagation of a plane combustion wave are investigated. Based on numerical calculations, the velocities of the propagation of the ground forest-fire front depending on the moisture content and heat and mass transfer of the falling pine needles with the environment are found. The gas composition above the fire source is also investigated. The emission coefficients under various extemal conditions and moisture content levels in the layer of pine needles are also determined. The limiting conditions for the propagation of the ground fire as a function of the moisture content in the layer of needles and the heat transfer coefficient are obtained.


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