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Etude expérimentale des régimes de combustion d'un feu de compartiment dans des conditions de sous-ventilation

Abstract : This study aimed at identifying the combustion regimes which develop during a compartment fire with a fuel source located in the zone trapped behind a soffit. The behaviour of the flame was studied as a function of the geometry of the compartment, the flow rate and type of fuel and the ventilation factor. An experimental compartment was built, and visualisations of the light emitted by the flame, and measurements of velocity, temperature and chemical composition were performed. A flame is stabilised by a triple flame at the interface between the ventilated zone in the lower part of the compartment and the unventilated zone above the level of the soffit. This reactive structure, together with the measurement of the area of the flame, allows the behaviour of the fire to be determined as a function of the experimental conditions. The flame is stable when the propagation velocity of the premixed flame is higher or equal to the velocity of the convective flow. Two combustion regimes are observed, one controlled by the available fuel (flowrate introduced), the other controlled by the air entering the compartment, occurring when the ventilation factor is low. The transition from this flame regime to involvement of flammable targets is studied.
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https://tel.archives-ouvertes.fr/tel-00259507
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Submitted on : Thursday, February 28, 2008 - 1:27:04 PM
Last modification on : Thursday, March 7, 2019 - 3:08:06 PM
Long-term archiving on: : Thursday, May 20, 2010 - 7:18:06 PM

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  • HAL Id : tel-00259507, version 1

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Anthony Edwin Pearson. Etude expérimentale des régimes de combustion d'un feu de compartiment dans des conditions de sous-ventilation. Energie électrique. Université de Poitiers, 2007. Français. ⟨tel-00259507⟩

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