Surface forest fire spreading to the fall-off of coniferous and deciduous trees

摘要

Experimental results on forest combustibles (FC) burning are treated in the paper. The relations V $EQ V$- 0$/exp($MIN@W$+2$//W$-0$/$+2$/) are proposed to describe the dependence of the burning front movement velocity on the humidity W (V$-0$/ $EQ 3 mm/s is the velocity of the burning front movement for dry FC). Maximum radiation temperature of the condensed phase burning within the range of the 3 to 12 $mu@m, reconstructed by the blackbody radiation law at the radiation coefficient $epsilon of 1, is 800 - 900 K for dry needles of pine and cedar. The higher is humidity, the lower is the maximum radiation temperature.