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Fire Suppression Efficiency Screening Using a Counterflow Cylindrical Burner.

pdf icon Fire Suppression Efficiency Screening Using a Counterflow Cylindrical Burner. (792 K)
Yang, J. C.; Donnelly, M. K.; Prive, N. C.; Grosshandler, W. L.

ASME/JSME Joint Thermal Engineering Conference, 5th Proceedings. March 15-19, 1999, San Diego, CA, 1-8 pp, 1999.


fire suppression; burners; drop sizes; droplets; halons


The design and validation of a counterflow cylindrical burner for fire suppression efficiency screening are described. The stability limits of the burner were mapped using various fuel (propane) and oxidizer (air) flows. The stability enveloped compared favorably with those reported in the literature. the apparatus was characterized using inert gases (argon, helium, and nitrogen), and the relative fire suppression efficiency ranking of these three gases was found to be commensurate with that from cup-burner tests. For liquid suppression experiments, a piezoelectric droplet generator was used to form droplets (< 100 mum). Water was used as a representative liquid suppressant to study the feasibility of using such a burner for screening liquid agents. Extinction was facilitated with the addition of water droplets, and the effect of water became more pronounced when its application rate was increased. Suppression experiments using water with and without nitrogen dilution in the oxidizer stream were also performed. Flame extinction due to the combined effect of water and nitrogen dilution was demonstrated.