CHARACTERISTICS OF THE FLYING OF FOREST COMBUSTIBLE MATERIALS UPSTREAM OF A FIRE BARRAGE UNDER THE ACTION OF AN AIR FLOW

Results of experiments on determination of the temperature, velocity, and mechanical trajectory of fragments of forest combustible materials subjected to pyrolysis, fl ying away under the action of high-velocity air fl ow, are presented. The effect of fl ying of such fragments over a fi re barrage was mainly investigated. The experiments were performed with conifer needles and leaves, representing typical combustible materials in ground forest fi res. On the basis of the experimentally determined effect of inclination of a fl ame over a fi re barrage formed of moistened forest materials, physical and mathematical models of fl ying of fragments of forest combustible materials subjected to pyrolysis upstream of such a fi re barrage have been developed. With the use of these models, the characteristic length of the zone of fl ame combustion of a forest material, the height of the fl ame in this zone, and the geometric dimensions of the fi re barrage necessary and suffi cient for reliable localization of the fl ame combustion and thermal decomposition of forest combustible material were determined
   
Author:  D. V. Antonov, A. O. Zhdanova, G. V. Kuznetsov, N. P. Kopylov, I. R. Khasanov, and N. E. Shlegel
Keywords:  forest combustible material, pyrolysis, combustion, fi re barrage, wind
Page:  114