What is it about?
We performed a parametric study of bare TNT explosive charges with and without thermal radiation from soot particles. TNT has extremely fuel-rich detonation products which burn in a process known as afterburning at timescales much greater than the initial detonation. We explore the relationship between the flow and chemical times, both for the gas-phase and particle-phase.
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Why is it important?
The majority of simulations performed with high explosives use simplified chemical models, either in the form of a global mechanism or severely reduced mechanism. This work allows us to consider the accuracy of that assumption.
Perspectives
Our prior work on PETN showed us that the mixing-limited chemistry assumption commonly used with high explosive simulations might not be accurate at smaller scales. PETN has a much better oxygen balance than TNT. Therefore, TNT produces substantially more afterburning. It is good to understand which type of explosives can use the mixing-limited chemistry assumption because it substantially speeds up simulations.
Anthony Egeln Jr
University of Florida
Read the Original
This page is a summary of: The Influence of Detailed Chemical Kinetics and Radiation on the Post-Detonation Afterburning of TNT, January 2025, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2025-1584.
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