On the development of engineering calculation technique for critical conditions of fire spreading inside heterogeneous systems

The engineering calculation technique for critical conditions of fire spreading inside heterogeneous systems is described. It has a great practical meaning. The function characterizing the limiting system state is considered on the base of statistical analysis. It is defined the concentration of burning components as a danger criterion for the certain point of the system under consideration; and the value being the critical conditions of fire spreading. The obtained expression can be applied within the wide range of reacting substance concentrations and pressures.