One-dimensional Thermal Explosion Test and Numerical Simulation of DNTF-based High-energy Explosives

To study the response of 3,4-dinitrofurazanfuroxan (DNTF)-based high-energy explosives under thermal loads, the one-dimensional thermal explosion tests on the high-energy explosive are conducted, in which the temperature evolution in the explosive is measured by thermocouple sensors. The ignition delay time of DNTF-based high-energy explosive is obtained from the temperature rise curves. Moreover, the overall temperature change process and hotspot formation process of the explosive are simulated by the one-dimensional thermal explosion numerical simulation. The results show that the ignition delay time of DNTF-based high-energy explosives becomes shorter with the increase in ambient temperature. When the shell constraint remains unchanged, the higher the ambient temperature is, the higher the reaction violence of DNTF-based explosive is. When the temperature of DNTF-based high-energy explosive rises at 1°C/min, the temperature at the central part of the explosive is the highest and the heat cannot be dissipated, ultimately leading to an ignition reaction occurring at the central part of the explosive. When DNTF-based explosives are heated isothermally, the time from the start of heating to ignition decreases as the heating temperature increases. The location where ignition occurs eventually shifts from the center of the explosive to both ends of the shell.