Blast waves generated in an unconfined space by a nonideal detonation of high-density aluminum-enriched formulations |
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Authors: | A A Borisov A A Sulimov M K Sukoyan P V Komissarov I O Shamshin R Kh Ibragimov Yu M Mikhailov |
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Institution: | (1) Materials Science and Chemical Engineering Department, Turin Technical University, 10129 Torino, Italy;(2) Chemical and Industrial Chemistry Department, Genova University, 16146 Genova, Italy;(3) Mechanical Engineering Department, Rome “Tor Vergata” University, 00133 Roma, Italy;(4) Explosives Chemistry Institute, Italian Military Navy, 19138 La Spezia, Mariperman, Italy;(5) Explosives Technology Laboratory, Italian Military Navy, 19138 La Spezia, Mariperman, Italy |
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Abstract: | Experiments on the detonation of high-density (1.8 g/cm3) aluminum-ammonium perchlorate-paraffin-RDX formulations in an unconfined space demonstrated their high efficiency at pressure
amplitudes within 0.3–7.0 atm. The relative pressure amplitude and impulse of the blast waves with respect to the analogous
characteristics of TNT charges of the same mass were found to be 1.3–2.4. The TNT equivalents in pressure and impulse vary
with the distance nonmonotonically, ranging within 1.4–2.8. The blast wave produced by an infield explosion of a 1.42-kg composite
charge demonstrated its high performance characteristics. Measurements at blast wave amplitudes of 1 to 20 atm gave a TNT
equivalent in pressure of up to 3 and a TNT equivalent in impulse of 1.3 to 1.8. The high parameters of blast waves in an
unconfined space originate from both the high-energy characteristics of the systems themselves and the afterburning of excess
metal fuel in air. To estimate the extent of participation of the reaction of excess metal fuel with air in supporting the
blast wave, numerical simulations of the generation of blast waves for various rates of mixing of detonation products with
air at the contact surface were conducted. The main elements of the mechanisms of the processes that determine the efficiency
of explosive systems with a heat release spread in space and time were considered. It was concluded that an optimal regime
of blast wave generation, capable of ensuring a prolonged attenuation of the wave with the distance, could be realized for
low-velocity detonation. |
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