DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 1-2/2018 str. 82     <-- 82 -->        PDF

Qi            heat per unit mass of fuel necessary for ignition – toplina po količinskoj jedinici goriva potrebnog za izgaranje, kJ kg–1
Qw           water latent heat of evaporation – latentna toplina isparavanja vode, kJ kg–1
R              fire-spread rate – stopa širenja požara, m s–1
ρb            fuel bed density – gustoća ložišta, kg m–3
tr              flame residence time – vrijeme zadržavanja plamena, s
Tf             fuel initial temperature – početna temperatura goriva, °C
Ti                    fuel igniting temperature – temperatura zapaljenja goriva, °C
Tv                   water boiling temperature – temperatura vrelišta vode, °C
w             fuel load – količina goriva, kg m–2
ACKNOWLEDGEMENTS
ZAHVALE
The first author was supported by the Fundação para a Ciência e a Tecnologia (post-doctoral grant SFRH/BPD/84770/2012, financing programs POPH and FSE). We thank Isabela Abazaj for the assistance with the English to Croatian translation.
REFERENCES
LITERATURA
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Anderson, W.R., M.G. Cruz, P.M. Fernandes, L. McCaw, J.A. Vega, R. Bradstock, L. Fogarty, J. Gould, G. McCarthy, J.B. Marsden-Smedley, S. Matthews, G. Mattingley, G. Pearce, B. Van Wilgen, 2015: A generic, empirical-based model for predicting rate of fire spread in shrublands. Int J Wildland Fire 24: 443-460.
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McAlpine, R.S., 1995: Testing the effect of fuel consumption on fire spread rate. Int J Wildland Fire 5: 143-152.
McArthur, A.G., 1962: Control burning in eucalypt forests. Australian Forestry and Timber Bureau. Canberra, ACT. Leaflet No 80.
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Sažetak
Analizirana je uloga pojedinih svojstava ložišta u stopi širenja šumskog požara, na temelju ravnoteže toplinske energije, iz koje je razvijen poznati Rothermelov model širenja požara (1972), pokazujući da niti visina ložišta, jednako kao ni količina i gustoća ne utječu izravno na ravnotežu toplinske energije. Utjecaj tih parametara, često izvedenih iz empirijskih opisa stope širenja, nužno proizlazi iz neizravnih utjecaja na mehanizme prijenosa topline. Udio topline prenesen iz plamena na nesagorijelo gorivo, pretežno ovisi o sadržaju vlage u gorivu te je neovisan od stope širenja te oblika plamena. S obzirom na to da empirijski modeli uglavnom impliciraju mehanizme širenja požara u opisivanju njegovog ponašanja, rezultati ove studije mogu biti od pomoći u osmišljavanju i ocrtavanju budućih eksperimenata i pristupa.
Ključne riječi: ponašanje požara, šumski požari, sagorijevanje, prijenos topline.