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Thermal conductivity of energetic materials
Journal of Energetic Materials ( IF 2.1 ) Pub Date : 2019-10-23 , DOI: 10.1080/07370652.2019.1679285
Zachary D. Lawless 1 , Michael L. Hobbs 1 , Michael J. Kaneshige 2
Affiliation  

ABSTRACT 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.

中文翻译:

含能材料的热导率

摘要 使用有限元分析 (FEA) 和来自桑迪亚仪表热点火 (SITI) 实验的烹饪数据,已经确定了各种含能材料 (EM) 的热导率。研究的材料包括熔铸、压制和低密度炸药。低密度炸药要么是小球,要么是粉末,一些实验以倾倒密度(未压制)进行。我们已经将我们的几个热导率与文献中的热导率进行了比较,并研究了限制性铝和爆炸物之间的接触电阻、多维传热效应以及热电偶珠位置的不确定性。我们已经确定在 SITI 实验中接触电阻最小,沿中平面的热传递是一维的,并且热电偶位置的不确定性在加热边界附近最大。我们的热导率值可与动力学机制结合使用,以准确预测炸药燃烧过程中的热分布和能量耗散。
更新日期:2019-10-23
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