Critical heat dissipation length scales in fully dense thermite foils

Kinsey Alex H.; Behrou Reza; Guest James K.; Weihs Timothy P.

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Critical heat dissipation length scales in fully dense thermite foils

机译：完全致密的铝热箔中的关键散热长度成比例

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One strategy to suppress metal vapor production in fully dense thermite mixtures is to dilute with excess inert metal to lower the reaction temperature below the boiling point of the metal. However, if the diluent is inhomogenously distributed throughout the microstructure, localized hot regions can be present, resulting in local temperatures exceeding the boiling point of the metal. Fully dense Al:Cu2O:Cu foils are analyzed to determine the critical length scales necessary to suppress Cu vapor during reaction. The microstructures of these foils, more specifically length scales of reactive and inert material, are critically analyzed using image analysis. The results from image analysis are then compared with finite element heat transfer simulations used to determine critical length scales of thermite and diluent required to suppress metal vapor production during reaction of fully dense Al:Cu2O:Cu foils. (C) 2017 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

机译：抑制在完全致密的铝热剂混合物中产生金属蒸气的一种策略是用过量的惰性金属稀释以将反应温度降低到金属的沸点以下。但是，如果稀释剂在整个微观结构中分布不均匀，则可能会出现局部高温区域，从而导致局部温度超过金属的沸点。分析完全致密的Al：Cu2O：Cu箔以确定在反应过程中抑制Cu蒸气所必需的临界长度尺度。这些箔的微观结构，更具体地说是反应性和惰性材料的长度尺度，使用图像分析进行了严格分析。然后将图像分析的结果与用于确定在完全致密的Al：Cu2O：Cu箔反应期间抑制金属蒸气产生所需的铝热剂和稀释剂的临界长度尺度的有限元传热模拟进行比较。（C）2017燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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《Combustion and Flame》 |2018年第4期|432-440|共9页
作者
Kinsey Alex H.; Behrou Reza; Guest James K.; Weihs Timothy P.;
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作者单位

Johns Hopkins Univ, Dept Mat Sci & Engn, 3400 N Charles St, Baltimore, MD 21218 USA;

Johns Hopkins Univ, Dept Civil Engn, 3400 N Charles St, Baltimore, MD 21218 USA;

Johns Hopkins Univ, Dept Mat Sci & Engn, 3400 N Charles St, Baltimore, MD 21218 USA;

Johns Hopkins Univ, Dept Mat Sci & Engn, 3400 N Charles St, Baltimore, MD 21218 USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
Thermites; Heat transfer modeling; Image analysis; Al:Cu2O;

机译：铝热剂;传热建模;图像分析;Al：Cu2O;

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Critical heat dissipation length scales in fully dense thermite foils

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