Abstract
In order to investigate the effect of nano-aluminum powder on the characteristic of RDX based aluminized explosives underwater closed-filed explosions, the scanning photographs along the radial of the charges were gained by a high speed scanning camera. The photographs of two different aluminized explosives underwater explosion have been analyzed, the shock wave curves and expand curves of detonation products were obtained, furthermore the change rules of shock waves propagation velocity, shock front pressure and expansion of detonation products of two aluminized explosives were investigated, and also the parameters of two aluminized explosives were contrasted. The results show that the aluminized explosive which with nano-aluminum whose initial shock waves pressure propagation velocity, shock front pressure are smaller than the aluminized explosive without nano-aluminum and has lower decrease rate attenuation of energy.
Highlights
Aluminized explosives is a kind of high-density, high-power high-explosive heat of mixing explosives, damaging effects on the target can be increased, which has important applications in underwater weapons, air weapons and armor charge [1], especially in the underwater explosion the aluminized explosive shock wave and bubble can significantly higher than non-aluminized explosives
The aluminized explosives detonation is not ideal detonation process, for the aluminum involved in the reaction [2], the content of aluminum powder, particle size, shape and activity will effect on the detonation process and produces a large charge influence [3]-[4], such as the impact of ultrafine particles of aluminum nanopowders of aluminized explosive properties, becoming one of hot research
Huang Hui, etc.through studied, found that thenano-aluminum composite explosiveshave stronger ability of metal acceleration, and the reaction time is more short [5]; Shen Fei, etc.have studied different aluminum-containing explosive shock wave propagation in water near field, and the results were compared with TNT, it showed the pressure decay process, the reaction of aluminum makes shock wave pressure decay rate has been reduced [6]; Zhou Lin, etc
Summary
Aluminized explosives is a kind of high-density, high-power high-explosive heat of mixing explosives, damaging effects on the target can be increased, which has important applications in underwater weapons, air weapons and armor charge [1], especially in the underwater explosion the aluminized explosive shock wave and bubble can significantly higher than non-aluminized explosives. The aluminized explosives detonation is not ideal detonation process, for the aluminum involved in the reaction [2], the content of aluminum powder, particle size, shape and activity will effect on the detonation process and produces a large charge influence [3]-[4], such as the impact of ultrafine particles of aluminum nanopowders of aluminized explosive properties, becoming one of hot research. The effect of Nano-aluminum on aluminized explosives near field underwater explosion characteristics can provide important reference for the water weapons design and the power assessment. A series experimental investigation were done to characterize the effects of nano-aluminum powder on the shack wave pressure decay and bubble expansion speed of aluminized explosives
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