Simulation results are presented about the glowing combustion of thick moist wood samples exposed to fire-level heat fluxes, using a front model comprehensive of all the relevant heat and mass transfer phenomena and based on thermally controlled drying, finite-rate kinetics pyrolysis and mixed kinetic-diffusive controlled combustion. The solution shows that, apart from short initial and final transients, an ablation regime is established given high external heat fluxes and/or high moisture contents. Drying, pyrolysis, and combustion take place simultaneously along a constant-thickness layer that propagates at a constant rate (the same for the three fronts) towards the cold sample side. Good quantitative agreement is obtained between model predictions and measurements.
Development of a front-based model for the glowing combustion of wood / Galgano, A; Branca, C; Di Blasi, C. - (2016). (Intervento presentato al convegno XXXIX Meeting of the Italian Section of the Combustion Institute tenutosi a Napoli nel 4-6 luglio 2016) [10.4405/39proci2016.I2].
Development of a front-based model for the glowing combustion of wood
Galgano A;
2016
Abstract
Simulation results are presented about the glowing combustion of thick moist wood samples exposed to fire-level heat fluxes, using a front model comprehensive of all the relevant heat and mass transfer phenomena and based on thermally controlled drying, finite-rate kinetics pyrolysis and mixed kinetic-diffusive controlled combustion. The solution shows that, apart from short initial and final transients, an ablation regime is established given high external heat fluxes and/or high moisture contents. Drying, pyrolysis, and combustion take place simultaneously along a constant-thickness layer that propagates at a constant rate (the same for the three fronts) towards the cold sample side. Good quantitative agreement is obtained between model predictions and measurements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
