REGULARITIES OF THE EFFECT OF TECHNOLOGICAL PARAMETERS ON FIRE SAFETY OF PYROTECHNICAL NITRATE-TITANIUM MIXTURES IN EXTERNAL THERMAL CONDITIONS

At the stage of designing pyrotechnic articles on the basis of compacted nitrate-titanium mixtures it is necessary to predict the critical modes of their heating, the excess of which leads to the surface destruction of the charges of the mixtures, as a result of which there is an explosive operation in operating conditions. Refined mathematical models of heating charge mixtures, taking into account the temperature dependences of the thermophysical properties of mixtures (volumetric heat capacity, coefficient of thermal conductivity), and allow to more accurately calculate the distribution of temperatures and thermal-elastic stresses on the charge thickness. For the first time, the critical values of the parameters of external thermal actions (heat fluxes, their time of action) were established, which comparison with the obtained experimental data showed their coincidence with a relative error of 8… 10%.