Analysis of the smoke plume behaviour downstream of a fire in a longitudinally ventilated tunnel

Abstract : In a longitudinally ventilated tunnel, a minimum airflow velocity is required to prevent the formation of a back flow of smoke. Theoretical and semi-empirical models are available to relate this “critical velocity” to the fire heat release rate. Experiments were carried out on a scale-down densimetric tunnel model in order to investigate how the buoyant source size may affect the critical velocity. A particular result is that, by increasing the source size and for a given convective heat release rate, the critical velocity reaches a minimum in case of pure plume, for which momentum and buoyancy effects are balanced.
Type de document :
Communication dans un congrès
12th Symposium on Aerodynamics and Ventilation of Vehicle Tunnels, BHr Group, Portoroz(Slovenia), pp.47-60, 2006, 2006, France. pp.47-60, 2006
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https://hal.archives-ouvertes.fr/hal-00536215
Contributeur : Ghislain Michaux <>
Soumis le : lundi 15 novembre 2010 - 16:12:21
Dernière modification le : lundi 21 janvier 2019 - 15:10:05

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  • HAL Id : hal-00536215, version 1

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Ghislain Michaux, Olivier Vauquelin. Analysis of the smoke plume behaviour downstream of a fire in a longitudinally ventilated tunnel. 12th Symposium on Aerodynamics and Ventilation of Vehicle Tunnels, BHr Group, Portoroz(Slovenia), pp.47-60, 2006, 2006, France. pp.47-60, 2006. 〈hal-00536215〉

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