The paper presents results of an experimental study of the propagation characteristics of grassland fire front, its effect on meteorological parameters and the emission of gaseous combustion products. As a result of the study, it was found that the seat of fire of a small-scale combustion lead to an increase in air temperature by 2-3 degrees and a decrease in relative humidity by 5%. The highest pulsations amplitude of the wind velocity vertical component of 12 m/s was recorded using a weather station installed at a relatively low height. These pulsations are due to the strong inhomogeneous of the upward flow of combustion products.
The paper describes the study of the ignition of wood samples treated with a flame retardant in the presence of different ignition sources (firebrands, pine needle litter) under the laboratory conditions, and to obtain data on fire resistance of wood samples exposed to heat. The charring depth of the wood samples was determined depending on the type of wood, as well as on the type of the fire retardant used. The experimental results show that fire retardants significantly increase the protective properties of wood exposed to firebrands.
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