Physicochemical Details at the Surface of Burning Illumination Flares
Rept. for 1 Jul 1973-31 Dec 1974
NAVAL WEAPONS CENTER CHINA LAKE CA
Pagination or Media Count:
The surface processes during the combustion of magnesiumsodium nitratebinder illumination flares were observed using color cinephotomicrography. Examination of the films has led to several conclusions relative to the physicochemical details of pyrotechnic combustion of a limited class of materials. In binder-containing flares the surface temperature has been inferred at between 380C and 651C. The major means of removal of magnesium from the surface is expulsion in the condensed phase as a result of local overpressure due to interfacial oxidation and subsequent gasification of molten binder. The effect on intensity, efficiency and burning rate of magnesium particle size and content was examined, as well as of binder type and content. When little or no binder is present completely different processes dominate and surface temperatures are much higher.
- Physical Chemistry
- Combustion and Ignition