Experimental and numerical study of fire event involving two simultaneous fire sources in confined and ventilated compartments

Hugues Pretrel (1) , William Plumecocq (1)

1 IRSN/PSN-RES/SA2I - Service des Agressions Internes et des risques Industriels

The study deals with fire events involving two simultaneous fire sources in a confined and ventilated set of enclosures. Within the framework of fire safety assessment in nuclear facilities, it aims at investigating two configurations, one with two fire rooms separated by an adjacent empty room and a second one with two adjacent fire rooms. The objective is to analyse how a secondary fire may influence a primary fire, the flows at doorways and the overall smoke propagation. Some experimental results obtained for two large scale fire tests performed with gas burners are discussed. A specific analysis of the level of temperature in the fire rooms and in the adjacent room is presented. Numerical simulations with a zone approach are performed and satisfactory agreements are found between calculations and experimental data. The study shows that the distance between fires in case of multiple fire event is an important parameter. Close fires lead to an increase in aggression around the fire place whereas distance fire contributes to maximize the smoke temperature and therefore the aggression in the neighbouring area around fire places.

Mots clés: pool fire; compartment; smoke; ventilation

Domaines: Milieux fluides et réactifs

Hugues Pretrel, William Plumecocq. Experimental and numerical study of fire event involving two simultaneous fire sources in confined and ventilated compartments. Interflam 2019, Interscience communications, Jul 2019, London, United Kingdom. ⟨irsn-04066650⟩