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Etudes sur les systèmes fixes d'aspersion d'eau en tunnel

Abstract : Water based fixed fire suppression systems are often listed as systems that may improve user safety in road tunnels. However, their effects on a tunnel fire and the possible interactions with the ventilation system are still roughly known. The work presented herein aims at assessing the impact of such systems by both a phenomenological approach of evaporation and a three-dimensional CFD code use. This numerical attempt relies on experimental data provided by both an academic experiment on an evaporating spray and fire tests performed in a tunnel at intermediate scale. The results obtained within an Euler-Lagrange framework for the two-phase flow can be considered as satisfactory. The water based system impact on smoke layer propagation is studied in details. However, such modelling requires high level input data that can only be obtained trough nozzle characterisation experiments. A more phenomenological approach that can be integrated in a 1D model has also been derived.
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https://tel.archives-ouvertes.fr/tel-00363815
Contributor : Xavier Ponticq <>
Submitted on : Tuesday, February 24, 2009 - 3:05:29 PM
Last modification on : Friday, October 23, 2020 - 4:49:28 PM
Long-term archiving on: : Tuesday, June 8, 2010 - 8:15:05 PM

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  • HAL Id : tel-00363815, version 1

Citation

Xavier Ponticq. Etudes sur les systèmes fixes d'aspersion d'eau en tunnel. Dynamique des Fluides [physics.flu-dyn]. Université Claude Bernard - Lyon I, 2008. Français. ⟨tel-00363815⟩

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