Quantification of thermal effect of a thermobaric detonation by infrared imaging technique

摘要

The aim of this work was to quantify the thermal effect of a thermobaric detonation by a thermography method in field tests, i.e. in static conditions. Thermobaric cast-cured PBX explosive test samples of two different masses were prepared. First, the following properties were determined for the examined explosive: density, detonation velocity and viscosity build-up in time. Experimental models were initiated by electro detonating cap and a plastic explosive booster. Detonation process and formation of the blast fireball were recorded by Phantom V9, TV high-speed camera, and by FUR SC7200, infrared camera. Software "Altair" was used for data acquisition and analysis. Recordings of the IR scene of detonations were used to determine the temperature-time dependence at different distances from the detonation centre and the maximum developed temperatures. Also, the spatial distribution of the evolved heat in the blast fireball has been recorded. It was shown that it is possible to track and quantify the thermal effects by thermographic technique, but there is still much research to be done in this field.