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Measurement and Modelling of Pyrotechnic Time Delay Burning Rates: Method and Model Development
Author(s) -
Montgomery Yolandi C.,
Focke Walter W.,
Kelly Cheryl
Publication year - 2017
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201700107
Subject(s) - detonator , thermocouple , thermal conductivity , materials science , analytical chemistry (journal) , kinetic energy , thermal , infrared , thermodynamics , mechanics , chemistry , composite material , optics , explosive material , physics , organic chemistry , chromatography , quantum mechanics
The burning rates of a slow reacting Mn+Sb 2 O 3 and a fast reacting Si+Pb 3 O 4 time delay composition, filled into lead tubes, were measured with an infrared camera, with two thermocouples and in the form of a fully assembled detonator. The infrared camera method returned values that were on average about 12 % lower than those recorded for the detonators. The temperature profiles measured for the slow burning elements were fully developed, whereas those obtained for the fast burning Si+Pb 3 O 4 elements were not. A numerical model was developed to simulate the Mn+Sb 2 O 3 system. Kinetic parameters were determined by least square fits to the recorded surface temperature profiles. The model made it possible to determine the effect of various property variations on the burning rate. The thermal conductivity of the delay composition was found to have the smallest impact and the heat of reaction the largest effect.