Fire Safety Science Digital Archive

Influence of the aerosol, formed due to rapid evaporation of superheated water with temperature 150 C, on a premixed methane-air flame in a spherical closed vessel with a volume 20 dm3 is experimentally investigated. Flammability limits and laminar burning velocities are determined for various water aerosol mass concentrations and gaseous mixture compositions. Low inertization effectiveness of aerosol is revealed, which is due to formation of relativly large water droplets. Aerosol inertization action is almost entirely stipulated by an availability of saturated steam in it. Exponential reduction of the laminar burning velocity of the methane-air mixtures with the elevation of a mass aerosol concentration is found.