Investigation on energy output structure of explosives near-ground explosion
In order to give the energy output structure of typical explosives near-ground explosion in real ground conditions, the free-field shockwave, ground reflection shockwave and Mach wave overpressure time history of composition B explosive, RDX explosive and aluminized explosive were measured by air pr...
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sg-ntu-dr.10356-1451292020-12-19T20:11:50Z Investigation on energy output structure of explosives near-ground explosion Xu, Wen-long Wang, Cheng Yuan, Jian-ming Goh, Wei-liang Li, Tao Temasek Laboratories @ NTU Science::Physics Near-ground Blast Reflected Wave In order to give the energy output structure of typical explosives near-ground explosion in real ground conditions, the free-field shockwave, ground reflection shockwave and Mach wave overpressure time history of composition B explosive, RDX explosive and aluminized explosive were measured by air pressure sensors and ground pressure sensors. The shape of the free-field shock wave, ground reflection shock wave, and Mach wave and explosion flame were captured by high-speed camera. The experimental results show that, at the same horizontal distance from the initiation point, the peak overpressure of explosive shock wave of composition B explosive, both in the air and on the ground, is less than that of RDX and aluminized explosives. At a distance of 3.0 m from the initiation point, the peak overpressure of aluminized explosives is slightly less than that of RDX explosives. Owing to the exothermic effect of aluminum powder, the pressure drop of aluminized explosives is slower than that of RDX explosives. At 5.0 m from the initiation point, the peak overpressure of aluminized explosives is larger than that of RDX explosives. At the same position from the initiation point, among the three kinds of explosives, the impulse of aluminized explosives is the maximum and the impulse of composition B explosives is the minimum. With the increase of the horizontal distance from the initiation point, the height of Mach triple-points (Mach steam) of the three explosives increases gradually. At the same horizontal distance from the initiation point, there is poorly difference in the height of Mach triple-points between aluminized explosive and RDX explosive, and the height of Mach triple-points of composition B explosive is much smaller than that of other two explosives. The maximum diameter and duration of the fireball formed by aluminized explosives are the largest, followed by composition B explosive, and the maximum diameter and duration of the fireball formed by RDX explosive are the smallest. Published version 2020-12-14T01:07:31Z 2020-12-14T01:07:31Z 2019 Journal Article Xu, W., Wang, C., Yuan, J., Goh, W., & Li, T. (2019). Investigation on energy output structure of explosives near-ground explosion. Defence Technology, 16(2), 290-298. doi:10.1016/j.dt.2019.08.004 2214-9147 https://hdl.handle.net/10356/145129 10.1016/j.dt.2019.08.004 2 16 290 298 en Defence Technology © 2020 China Ordnance Society. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf |
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Science::Physics Near-ground Blast Reflected Wave Xu, Wen-long Wang, Cheng Yuan, Jian-ming Goh, Wei-liang Li, Tao Investigation on energy output structure of explosives near-ground explosion |
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In order to give the energy output structure of typical explosives near-ground explosion in real ground conditions, the free-field shockwave, ground reflection shockwave and Mach wave overpressure time history of composition B explosive, RDX explosive and aluminized explosive were measured by air pressure sensors and ground pressure sensors. The shape of the free-field shock wave, ground reflection shock wave, and Mach wave and explosion flame were captured by high-speed camera. The experimental results show that, at the same horizontal distance from the initiation point, the peak overpressure of explosive shock wave of composition B explosive, both in the air and on the ground, is less than that of RDX and aluminized explosives. At a distance of 3.0 m from the initiation point, the peak overpressure of aluminized explosives is slightly less than that of RDX explosives. Owing to the exothermic effect of aluminum powder, the pressure drop of aluminized explosives is slower than that of RDX explosives. At 5.0 m from the initiation point, the peak overpressure of aluminized explosives is larger than that of RDX explosives. At the same position from the initiation point, among the three kinds of explosives, the impulse of aluminized explosives is the maximum and the impulse of composition B explosives is the minimum. With the increase of the horizontal distance from the initiation point, the height of Mach triple-points (Mach steam) of the three explosives increases gradually. At the same horizontal distance from the initiation point, there is poorly difference in the height of Mach triple-points between aluminized explosive and RDX explosive, and the height of Mach triple-points of composition B explosive is much smaller than that of other two explosives. The maximum diameter and duration of the fireball formed by aluminized explosives are the largest, followed by composition B explosive, and the maximum diameter and duration of the fireball formed by RDX explosive are the smallest. |
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Temasek Laboratories @ NTU |
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Temasek Laboratories @ NTU Xu, Wen-long Wang, Cheng Yuan, Jian-ming Goh, Wei-liang Li, Tao |
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Article |
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Xu, Wen-long Wang, Cheng Yuan, Jian-ming Goh, Wei-liang Li, Tao |
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Xu, Wen-long |
title |
Investigation on energy output structure of explosives near-ground explosion |
title_short |
Investigation on energy output structure of explosives near-ground explosion |
title_full |
Investigation on energy output structure of explosives near-ground explosion |
title_fullStr |
Investigation on energy output structure of explosives near-ground explosion |
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Investigation on energy output structure of explosives near-ground explosion |
title_sort |
investigation on energy output structure of explosives near-ground explosion |
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2020 |
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https://hdl.handle.net/10356/145129 |
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