1Institut PRISME UPRES EA 4229, Université d'Orléans/ENSI de Bourges, 88 boulevard Lahitolle, 18020 Bourges Cedex, France.
2Laboratoire d'Energétique et de Mécanique Théorique et Appliquée CNRS-UMR, 7563, ENSEM-INPL, 02 avenue de la forêt de Haye, B.P. 160, 54504, Vandoeuvre Cedex, France.
*Address correspondence: Khaled CHETEHOUNA, Institut PRISME UPRES EA 4229, Université d'Orléans/ENSI de Bourges, 88 boulevard Lahitolle, 18020, Bourges Cedex, Phone: +33 248 484 065
The radiative heat flux received by vegetation is a leading process of the propagation of forest fires. This flux is a function of the flame height and of the absorption coefficient for radiation. We have measured these quantities during experiments of fire using Quercus coccifera as vegetal medium. The variation of the values of the absorption coefficient as a function of the load (surface density of vegetation) has been studied. As the absorption coefficient is proportional to the load; we have determined the proportionality coefficient, of course it depends upon the nature of the vegetation.
Radiative heat flux, flame height, absorption coefficient, vegetal medium, fire propagation models, thermal sensors
