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Developments of hot spots in energetic materials

Entwicklung von Hotspots in energetischen Materialien
: Langer, G.; Eisenreich, N.

Teipel, U. ; Fraunhofer-Institut für Chemische Technologie -ICT-, Pfinztal:
Energetic materials - production, processing and characterization
Pfinztal: ICT, 1998 (Proceedings of the International Annual Conference of ICT 29)
ISSN: 0722-4087
Fraunhofer-Institut für Chemische Technologie (Internationale Jahrestagung) <29, 1998, Karlsruhe>
Fraunhofer-Institut für Chemische Technologie (International Annual Conference) <29, 1998, Karlsruhe>
Conference Paper
Fraunhofer ICT ()

A thermal model was used to study the formation of hot spots in energetic materials responsible for the transition of deflagration to detonation. Hot spots are defined theor. as a short, focused energy input which is caused by a shock wave or penetrating hot gas. Solving the heat flow equation some interesting cases are discussed. An inert material can only spread out the heat pulses to a uniform distribution. A reactive material pyrolyzes by formation of craters or ignites. Depending on the d. of the hot spots and the intensity of the energy input the reacting front follows the generating wave immediately or delayed.