Quantifying energy transfer from a reacting thermite to a target using infrared diagnostics

Charles Crane, Michelle Pantoya, Jerry Dunn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A study was conducted to examine the energy transfer from a reacted thermite placed on a steel target substrate. A high speed infrared camera captured a temporally evolving thermal distribution on the substrate, while the thermite, which was placed in a v-notch, self propagated. The thermite investigated for this experiment was Aluminum with Iron (III) Oxide (Al-Fe 2O3). An energy balance model was developed to predict temperatures near the v-notch in order to quantify the amount of energy transferred into the steel. Results quantified the percent of energy available from the reaction that was conducted through the substrate and energy losses were estimated. The thermite reaction transferred 10% of the heat of reaction to the steel. The Al-Fe2O3 exhibited greater heat losses to convection and radiation upon propagation through the powder mixture. The Al-Fe 2O3 reaction produced more gas by chemistry, 10% by mass, which contributed to transporting energy away from the v-notch. Much work had been performed that examined the combustion behaviors from a reacting thermite, but there are very few studies that quantify the energy transfer from a reacting thermite to a target. This diagnostic approach and numerical analysis were the first steps toward understanding energy transferred from a thermite into a target, and lost to the environment.

Original languageEnglish
Title of host publicationProceedings of the ASME Summer Heat Transfer Conference 2009, HT2009
Pages31-40
Number of pages10
DOIs
StatePublished - 2009
Event2009 ASME Summer Heat Transfer Conference, HT2009 - San Francisco, CA, United States
Duration: Jul 19 2009Jul 23 2009

Publication series

NameProceedings of the ASME Summer Heat Transfer Conference 2009, HT2009
Volume3

Conference

Conference2009 ASME Summer Heat Transfer Conference, HT2009
CountryUnited States
CitySan Francisco, CA
Period07/19/0907/23/09

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  • Cite this

    Crane, C., Pantoya, M., & Dunn, J. (2009). Quantifying energy transfer from a reacting thermite to a target using infrared diagnostics. In Proceedings of the ASME Summer Heat Transfer Conference 2009, HT2009 (pp. 31-40). (Proceedings of the ASME Summer Heat Transfer Conference 2009, HT2009; Vol. 3). https://doi.org/10.1115/HT2009-88156