ANALYSIS OF THE TEMPERATURE EFFECT ON THE INITIATION OF COMBUSTION OF METALLIC FUEL IN PYROTECHNIC MIXTURES

Oleh MYROSHNYK; Ievgenii SHKOLIAR; Valentyn MELNYK; Oleksandr DIADIUSHENKO; Kostiantyn MYHALENKO; Maryna TOMENKO

Oleh MYROSHNYK Cherkasy institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine
Ievgenii SHKOLIAR Cherkasy institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine
Valentyn MELNYK Cherkasy institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine
Oleksandr DIADIUSHENKO Cherkasy institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine
Kostiantyn MYHALENKO Cherkasy institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine
Maryna TOMENKO Cherkasy institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine

Keywords: pyrotechnic mixtures, nitrate-metal sources of ignition

Abstract

The results of experimental studies and experimental-statistical models for evaluating the influence of technological parameters of charges of pyrotechnic nitrate-metal ignition sources and external factors on the ignition temperature of metal fuel particles in the products of thermal decomposition of nitrate-containing oxidizer and organic substance additives are presented. Thermal decomposition of the nitrate-containing oxidizer (sodium nitrate), additives of organic substances (paraffin, stearin, naphthalene, anthracene) and high-temperature oxidation of particles of metallic fuel magnesium in the decomposition products takes place. This leads to intensive heat release, ignition of metal particles, premature explosive activation of ignition sources and subsequent fire-hazardous destruction of products. At the same time, in many cases, premature explosive triggering of pyrotechnic products had catastrophic consequences, since the burning process of pyrotechnic charges that has begun cannot be effectively eliminated by modern fire extinguishing means.