Experimental and numerical study of pool fire suppression using water mist
Autor: | Pascal Boulet, G. Pianet, Arnaud Breton, Armelle Muller, Arthur Jenft, Anthony Collin |
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Přispěvatelé: | Centre National de Prévention et de Protection, Laboratoire Énergies et Mécanique Théorique et Appliquée (LEMTA ), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
Jazyk: | angličtina |
Rok vydání: | 2014 |
Předmět: |
Meteorology
020209 energy Nozzle Mist General Physics and Astronomy 020101 civil engineering 02 engineering and technology General Chemistry Fuel oil Mechanics 0201 civil engineering Volumetric flow rate [SPI]Engineering Sciences [physics] Stationary conditions Fire protection 0202 electrical engineering electronic engineering information engineering Environmental science General Materials Science Gas cooling Safety Risk Reliability and Quality Fire suppression |
Zdroj: | Fire Safety Journal Fire Safety Journal, Elsevier, 2014, 67, pp.1-12. ⟨10.1016/j.firesaf.2014.05.003⟩ |
ISSN: | 0379-7112 |
DOI: | 10.1016/j.firesaf.2014.05.003⟩ |
Popis: | International audience; Experiments in a real-scale room were done on water mist application to a pool fire. A fire produced with fuel oil in a 35 cm cylindrical pool was used, with a heat release rate reaching 75 kW in stationary conditions. Water application was studied with a nominal flow rate equal to 25 l/min provided by a set of four nozzles, injecting droplets with mean Sauter diameter equal to 112 μ m . Observations of fire suppression in these conditions showed two behaviors, which were analyzed and detailed with the help of numerical simulations conducted with FDS.v5. On one hand, a fast suppression (about 10 s required) was observed when water mist was applied to a developed fire. In this case, droplets were injected into a hot environment and thus evaporated strongly, generating a significant vapor concentration and resulting in a fast gas cooling and in an inerting effect. On the other hand, when the mist was applied early, fire growth was controlled, but its suppression required a longer application (about 1 min) and only occurred after a significant cooling of the flame and the liquid pool. These two mechanisms were detailed numerically through mass and energy balances for both the gas and the liquid phases and could help to derive suppression model improvements. |
Databáze: | OpenAIRE |
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