Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces
A layered charge composed of the JH-2 explosive enveloped by a thick-walled cylindrical casing (active aluminum/rubber and inert lithium fluoride/rubber composites) was designed and explosion experiments were conducted in a 1.3 m3 tank and a 113 m3 bunker. The blast parameters, including the quasist...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-04-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914721000404 |
| _version_ | 1811290511120531456 |
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| author | Jun-bao Li Wei-bing Li Jia-xin Yu Wei Xiao He-yang Xu |
| author_facet | Jun-bao Li Wei-bing Li Jia-xin Yu Wei Xiao He-yang Xu |
| author_sort | Jun-bao Li |
| collection | DOAJ |
| description | A layered charge composed of the JH-2 explosive enveloped by a thick-walled cylindrical casing (active aluminum/rubber and inert lithium fluoride/rubber composites) was designed and explosion experiments were conducted in a 1.3 m3 tank and a 113 m3 bunker. The blast parameters, including the quasistatic pressure (ΔpQS), special impulse (I), and peak overpressure (Δpmax), and images of the explosion process were recorded, and the influence of the Al content (30% and 50%) and Al particle size (1, 10, and 50 μm) on the energy release of aluminum/rubber composites were investigated. The results revealed that the use of an active layer increased the peak overpressure generated by the primary blast wave, as well as the quasistatic pressure and special impulse related to fuel burning within tens of milliseconds after detonation. When the Al content was increased from 30% to 50%, the increases of ΔpQS and I were not obvious, and Δpmax even decreased, possibly because of decreased combustion efficiency and greater absorption of the blast wave energy for layers with 50% Al. Compared with the pure JH-2 charge, the charge with 1 μm Al particles produced the highest Δpmax, indicating that better transient blast performance was generated by smaller Al particles. However, the charge with 10 μm Al particles showed the largest ΔpQS and I, suggesting that a stronger destructive effect occurred over a longer duration for charges that contained moderate 10 μm Al. |
| first_indexed | 2024-04-13T04:13:57Z |
| format | Article |
| id | doaj.art-0cabf19c23c044a3a44e02fee2e4f509 |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-04-13T04:13:57Z |
| publishDate | 2022-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-0cabf19c23c044a3a44e02fee2e4f5092022-12-22T03:03:01ZengKeAi Communications Co., Ltd.Defence Technology2214-91472022-04-01184583592Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spacesJun-bao Li0Wei-bing Li1Jia-xin Yu2Wei Xiao3He-yang Xu4ZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, ChinaZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, China; Corresponding author.ZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, ChinaSchool of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, ChinaA layered charge composed of the JH-2 explosive enveloped by a thick-walled cylindrical casing (active aluminum/rubber and inert lithium fluoride/rubber composites) was designed and explosion experiments were conducted in a 1.3 m3 tank and a 113 m3 bunker. The blast parameters, including the quasistatic pressure (ΔpQS), special impulse (I), and peak overpressure (Δpmax), and images of the explosion process were recorded, and the influence of the Al content (30% and 50%) and Al particle size (1, 10, and 50 μm) on the energy release of aluminum/rubber composites were investigated. The results revealed that the use of an active layer increased the peak overpressure generated by the primary blast wave, as well as the quasistatic pressure and special impulse related to fuel burning within tens of milliseconds after detonation. When the Al content was increased from 30% to 50%, the increases of ΔpQS and I were not obvious, and Δpmax even decreased, possibly because of decreased combustion efficiency and greater absorption of the blast wave energy for layers with 50% Al. Compared with the pure JH-2 charge, the charge with 1 μm Al particles produced the highest Δpmax, indicating that better transient blast performance was generated by smaller Al particles. However, the charge with 10 μm Al particles showed the largest ΔpQS and I, suggesting that a stronger destructive effect occurred over a longer duration for charges that contained moderate 10 μm Al.http://www.sciencedirect.com/science/article/pii/S2214914721000404Confined explosionAluminum powder/rubber compositesLayered chargeBlast parameters |
| spellingShingle | Jun-bao Li Wei-bing Li Jia-xin Yu Wei Xiao He-yang Xu Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces Defence Technology Confined explosion Aluminum powder/rubber composites Layered charge Blast parameters |
| title | Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces |
| title_full | Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces |
| title_fullStr | Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces |
| title_full_unstemmed | Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces |
| title_short | Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces |
| title_sort | blast performance of layered charges enveloped by aluminum powder rubber composites in confined spaces |
| topic | Confined explosion Aluminum powder/rubber composites Layered charge Blast parameters |
| url | http://www.sciencedirect.com/science/article/pii/S2214914721000404 |
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