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NUMERICAL STUDY OF THE EFFECT OF WIND VELOCITY ON THE EXTRACTION AND PROPAGATION SMOKE OF A FIRE IN A ROAD TUNNEL

DOI: 10.1615/ICHMT.2009.CONV.340
7 pages

Brahim Kalech
LETTM, Faculté des Sciences de Tunis Campus Universitaire 1060 Tunis TUNISIE

Mourad Bouterra
LETTM, Faculte Sciences de Tunis Campus Universitaire, 1060 Tunis, TUNISIE

Olivier Vauquelin
IUSTI, UMR CNRS 6595, Technopole de chateau Gombert,Marseille, FRANCE

Mohamed Afif El Cafsi
LETTM, Faculte Sciences de Tunis Campus Universitaire, 1060 Tunis, TUNISIE

Ali Belghith
Faculte des Sciences de Tunis, Laboratoire des Transferts de Chaleur et de Masse, Campus Universitaire, 1060 Tunis, Tunisia

Philippe Bournot
IUSTI UMR CNRS 6595, Technopole de Chateau-Gombert, 5 rue Enrico Fermi, 13013 Marseille Cedex 20 - France

Abstrakt

In this study, numerical simulation was carried out to analyze the effect of wind on the extraction and smoke behavior in a naturally ventilated tunnel. A FDS program was in numerical simulations. For air flow simulations, LES turbulence model and mixture fraction combustion model are used. This study showed that, the wind velocity is increased from 0.4 m/s to 1.4 m/s. The maximum of temperature in the tunnel is found to be less for wind velocity of 0.4 m/s. When the wind velocity increased the temperature distribution was titled in the direction of velocity.

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