Étude des interactions entre phénomènes d'incendie et systèmes d'extinction à eau. Développement d'un module d'extinction dans le logiciel FDS

Abstract : This work is devoted to the study of interactions between fuel, flame and water droplets generated by water mist systems. It is completed by an extinction model development in FDS (Fire Dynamics Simulator) software, which is a CFD code widely used by the scientific and engineering communities. Knowledge on physical phenomena induced by water application on fire is acquired thanks to an experimental campaign at real scale. 84 confined and ventilated fire tests have been carried out involving water mist and metrology allowing to study the influence on extinction of: fuel, combustion time before water mist application, pool diameter for liquid fuel fires, number of nozzles and fuel location. A post-processing in the form of mass and energy balances has been added to FDS, allowing to complete experimental observations and to quantify the different heat transfer modes before and during water application. Two complementary models allow extinction determination by fuel cooling and flame cooling / inerting effects. Their capability is analyzed for appropriate cases on the versions 5 and 6 of FDS. The capability of the complete modified code to predict extinction is finally evaluated
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Alexandre Jenft. Étude des interactions entre phénomènes d'incendie et systèmes d'extinction à eau. Développement d'un module d'extinction dans le logiciel FDS. Autre. Université de Lorraine, 2013. Français. ⟨NNT : 2013LORR0269⟩. ⟨tel-01750615⟩

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