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Pregledni rad

https://doi.org/10.31298/sl.142.1-2.7

On the fire-spread rate influence of some fuel bed parameters derived from Rothermel’s model thermal energy balance

Carlos G. Rossa orcid id orcid.org/0000-0002-6308-4235 ; University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, Vila Real, Portugal
Paulo M. Fernandes ; University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, Vila Real, Portugal


Puni tekst: engleski pdf 211 Kb

str. 77-80

preuzimanja: 453

citiraj


Sažetak

We analysed the role of some fuel bed properties on forest fire-spread rate based on the thermal energy balance upon which the well-known fire-spread rate model of Rothermel (1972) was developed, showing that neither fuel bed height, load or density directly influence the thermal energy balance. The influence of such parameters, often inferred from empirical descriptions of spread rate, must result from indirect effects on heat transfer mechanisms. The fraction of heat transferred from the flame to the unburned fuel depends mostly on fuel moisture content and is independent of spread rate and flame geometry. Because empirical models usually implicitly assume the underlying mechanisms of fire spread for describing fire behaviour, this study results can assist at idealizing and delineating future experiments and approaches.

Ključne riječi

fire behaviour, forest fires, combustion, heat transfer

Hrčak ID:

194637

URI

https://hrcak.srce.hr/194637

Podaci na drugim jezicima: hrvatski

Posjeta: 918 *