This research experimentally investigated the combustion of polymeric materials with water mist application in an enclosure, with an emphasis on the production of toxic gases. Two different diameters, ~100 and ~260 μm, were tested. The experimental conditions were determined based on Froude similarity laws for low drop Reynolds number conditions. Droplets and polymers’ physical and chemical properties influence the burning/extinguishing behavior and toxic-gas evolution. In general, larger droplets can extinguish a fire in a shorter time, and toxic gas concentrations in a test chamber decreased more rapidly. However, the large droplets tended to cause the flame expansion phenomenon for thermoplastics by splashing molten polymer. This flame expansion phenomenon led to a rapid increase in toxic-gas production rate. For a smaller size of water droplets, the formation of a char layer tended to slow down the fire-extinguishing process, which caused continuous CO production.
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Thinnakornsutubutr, Nicharee; Mizuno, Masayuki; and Kuwana, Kazunori
"Scale Model Experiments of Toxic Gas Production from the Combustion of Polymers when Applied with Different Droplet Sizes of Water Mist,"
Progress in Scale Modeling, an International Journal: Vol. 4:
1, Article 1.
Available at: https://uknowledge.uky.edu/psmij/vol4/iss1/1