Portal de Periódicos da CAPES

Afterburning of TNT Explosive Products in Air with Aluminum Particles

2008; Linguagem: Inglês

10.2514/6.2008-1029

Chang-Kee Kim, James G Moon, Ming‐Chia Lai, Kyoung-Su Im,

Structural Response to Dynamic Loads

Afterburning of TNT explosion is a very complex process containing the blast propagation from initial detonation products in high pressure and temperature, shock reflections from the wall and their interaction, fast turbulent mixing in air, multiphase phase phenomena due to including solid particles and their combustion. To understand the afterburning process of the thermobaric explosives, numerical modeling for the secondary burning of thermobaric explosives is investigated. As a candidate of the themobaric explosive, we selected 2.12 Kg of TNT containing small amount of solid aluminum particles ranging from 1% to 10 % of TNT amount. Detailed and comprehensive theoretical models for the blasting exothermic combustions including aerobic and anaerobic solid aluminum combustion are provided. Due to the dearth of experimental data, the comparisons are limited to the existing previous blast simulation results only. However most importantly, we demonstrate that by changing important parameters such as initial particle distribution, mean diameters, and ignition temperature, the developed simulation model in present study is suitable to predict not only the afterburning performance of TNT explosives, but the comprehensive understanding for the combustion mechanism of solid aluminum particles in blast products of the TNT explosives.