Study on the cylinder test of aluminized explosives with different content of Al powder

Abstract

To investigate the effect of the content of Al powder on the acceleration ability of the aluminized explosives, a series of 25mm cylinder experiments was conducted, and the content of Al/LiF powder is 0%, 15%, 30%. The radial expansion velocities of the cylinder wall were measured through the Photonic Doppler Velocimetry (PDV) system. The cylinder experiments verify that Al powder could react with detonation products to release energy, which enhance the accelerating ability of explosives. By comparing the different content of Al powder of aluminized explosives, it is found that the accelerating ability of aluminized explosives is related to the content of Al powder, and the optimal content of Al powder is 15% in this experiment. By comparing the same content of Al/LiF powder, it is indicated that the reaction delay time of Al powder in RDX80/Al15 explosive does not exceed 2.8µs, and as RDX65/Al30, the reaction delay time is less than 3µs. Finally, through normalization method, the specific reaction delay time of Al powder are 0.147 and 0.203, with the content of Al powder 15% and 30%.