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Effect Of Water Spray On Re-ignition Characteristics Of Solid Fuels

Moghtaderi, B., Novozhilov, V., Fletcher, D.F., Kent, J.H. and Apte, V.B., 1997. Effect Of Water Spray On Re-ignition Characteristics Of Solid Fuels. Fire Safety Science 5: 829-840. doi:10.3801/IAFSS.FSS.5-829


A set of small-scale experiments was carried out to study the effect of a water spray on the re-ignition characteristics of solid fuels. The influence of other key parameters, such as the incident heat flux and pre-burn, was also investigated. The experiments were conducted on specimens of wood and PMMA using a cone calorimeter. A water spray was produced by a small commercial nozzle. As expected, the effect of water on the re-ignition time was found to be significant. It was also found that the re-ignition characteristics of charring materials, such as wood, are quite different from non-charring materials (e.g. PMMA) mainly due to the structural differences. Based on the experimental observations a set of empirical correlations was obtained for both wood and PMMA samples. Predictions of the re-ignition time made by these correlations agree well with the measurements. Simulations of the re-ignition times were also performed using a detailed mathematical model. Comparisons with the experimental data are provided.


re-ignition, solid fuels, water spray, cone calorimeter

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