Analytical modeling of solid material ignition under a radiant heat flux coming from a spreading fire front

Abstract : This study aims at characterizing ignition of solid targets exposed to spreading fire fronts. In order to model radiant heat fluxes on targets in a realistic way, polynomial heat fluxes are chosen. Analytical solutions for the solid surface temperature evolution regarding different time-varying heat fluxes are discussed for high thermal inertia solids using a mathematical formalism, which allows for the methodology to be extended to the case of low thermal inertia. This formulation also allows calculation of ignition times for more realistic time-dependent fluxes than previous studies on the topic, providing a more general solution to the problem of solid material ignition. Polynomial coefficients are then obtained fitting heat flux coming from absorbing-emitting flames. A characterization of solid material ignition times regarding fire front rate of spread (ROS) is finally performed, showing the need to accurately model heat flux variations in ignition time calculations.
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Article dans une revue
Journal of Thermal Science and Engineering Applications, 2014, 6 (4), pp.044501. 〈10.1115/1.4028204〉
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https://hal.archives-ouvertes.fr/hal-01059491
Contributeur : Aymeric Lamorlette <>
Soumis le : lundi 1 septembre 2014 - 10:39:35
Dernière modification le : lundi 4 mars 2019 - 14:04:16

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Aymeric Lamorlette. Analytical modeling of solid material ignition under a radiant heat flux coming from a spreading fire front. Journal of Thermal Science and Engineering Applications, 2014, 6 (4), pp.044501. 〈10.1115/1.4028204〉. 〈hal-01059491〉

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