Suppression of combustible wood thermal decomposition reaction by vapor-droplet water flow

The experimental investigation results of macroscopic regularities of thermal decomposition reaction suppression by the vapor-droplet water flow (the drop sizes were varied in the range $0.160 < R_d < 0.175$ mm) for the typical (birch leaves, spruce needles) combustible woods are presented. The high speed video recording equipment, cross-correlation systems and particle image velocimetry methods were used. The typical of ground forest fire combustible woods thicknesses $L_f = 0.02$–$0.06$ m were considered. The characteristic times ( $t_d = 374$–$734$ s) of combustible woods temperature reduction to the values when the active phase of combustible wood thermal decomposition is completed were determine. The optimal conditions of heat and mass transfer and phase transformations at the boundary «vapor-droplet flow–combustible wood» under which the times of suppression reaction are minimal were determined.