Journal
JOURNAL OF ENERGETIC MATERIALS
Volume 38, Issue 2, Pages 214-239Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/07370652.2019.1679285
Keywords
Thermal conductivity; energetic materials; Teflon (TM); finite element analysis; contact resistance
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Funding
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA0003525]
- Joint DoD/DOE Munitions Program
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Thermal conductivity has been determined for a variety of energetic materials (EMs) using finite element analysis (FEA) and cookoff data from the Sandia Instrumented Thermal Ignition (SITI) experiment. Materials studied include melt-cast, pressed, and low-density explosives. The low-density explosives were either prills or powders with some experiments run at pour density (not pressed). We have compared several of our thermal conductivities with those in the literature as well as investigated contact resistance between the confining aluminum and explosive, multidimensional heat transfer effects, and uncertainty in the thermocouple bead positions. We have determined that contact resistance is minimal in the SITI experiment, the heat transfer along the midplane is one-dimensional, and that uncertainty in the thermocouple location is greatest near the heated boundary. Our values of thermal conductivity can be used with kinetic mechanisms to accurately predict thermal profiles and energy dissipation during the cookoff of explosives.
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