Experimental study of fire spread through discontinuous fuels without flame contact

There is a strong need to increase the basic understanding of the propagation mechanisms in wildfires to improve the scientific tools needed for firefighting and fire prevention. This study focuses on the fire spread mechanisms by radiation. Three contiguous trees were ignited and the mechanisms lea...

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Published in:Fire safety journal 2021-03, Vol.120, p.103066, Article 103066
Main Authors: Schneider, Leo, Betting, Benjamin, Patterson, Matthew, Skowronski, Nicholas, Simeoni, Albert
Format: Article
Language:English
Subjects:
Discontinuous fuel
Douglas fir
Fire fighting
Fire prevention
Fire spread
Forest fire
Heat flux
Heat transfer
Ignition
Radiation
Radiative transfer
Terrestrial environments
Wildfires
Wildland fire
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description There is a strong need to increase the basic understanding of the propagation mechanisms in wildfires to improve the scientific tools needed for firefighting and fire prevention. This study focuses on the fire spread mechanisms by radiation. Three contiguous trees were ignited and the mechanisms leading to flame spread to a target tree were analyzed. The experiments were designed to avoid fire spread by flame contact and study how radiation heat transfer could ignite the target tree. Different measurements were performed, including heat fluxes, temperature and mass loss rate. The vegetation was characterized in details by using terrestrial laser scan reconstruction. The analysis of the experimental results provides a detailed description of the competing mechanisms leading to an ignition or a lack of ignition of the target tree. •Fire spread with gaps between fuel elements.•Radiation transfer in wildland fires.•Impact of bulk density.•Impact of convective cooling.
doi_str_mv 10.1016/j.firesaf.2020.103066
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subjects Discontinuous fuel
Douglas fir
Fire fighting
Fire prevention
Fire spread
Forest fire
Heat flux
Heat transfer
Ignition
Radiation
Radiative transfer
Terrestrial environments
Wildfires
Wildland fire
title Experimental study of fire spread through discontinuous fuels without flame contact
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