Research of detonation products of RDX/Al from the perspective of composition
Aluminized explosives exhibit excellent performance because the oxidation of aluminum (Al) powders enhances the pressure and temperature of detonation products. However, the equation of state (EOS) of detonation products has not been understood well. In the present study, we conducted long-time test...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-06-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221491472200263X |
| _version_ | 1827917811023872000 |
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| author | Xing-han Li Zhi-cong Yi Qi-jun Liu Fu-sheng Liu Ze-teng Zhang Shen-yuan Hou Xian-xu Zheng Xu Zhang Hong-bo Pei |
| author_facet | Xing-han Li Zhi-cong Yi Qi-jun Liu Fu-sheng Liu Ze-teng Zhang Shen-yuan Hou Xian-xu Zheng Xu Zhang Hong-bo Pei |
| author_sort | Xing-han Li |
| collection | DOAJ |
| description | Aluminized explosives exhibit excellent performance because the oxidation of aluminum (Al) powders enhances the pressure and temperature of detonation products. However, the equation of state (EOS) of detonation products has not been understood well. In the present study, we conducted long-time tests (approximately 1 ms) of a metal rod driven by detonation products of RDX, RDX/LiF, and RDX/Al. In addition, we used laser velocimetry (PDV) to measure the freesurface velocity of the rod. Thermochemical code DLCHEQ was successfully applied to the hydrodynamic program SSS to perform the rod-driven test, and a novel method was established to study the EOS of detonation products from the perspective of composition. The reliability of DLCEHQ was validated by a small deviation (<10%) between the experimental rod free-surface velocity of RDX and the calculated results; the deviation was considerably less than that from the results obtained using the JWL EOS and ideal-gas EOS. The endothermic process and the reaction of Al powders (Al+H2O+NO+CO2→CO+H2+N2+Al2O3) were analyzed by calculating the rod free-surface velocity of RDX/LiF and RDX/Al, respectively. The results of the present study demonstrated that the thermodynamic state of Al powders has notable influence on the EOS of aluminized detonation products, and the findings were compared with those of previous studies. First, the temperature equilibrium between Al powders and CHNO products is not always achieved, and the disequilibrium is more obvious when the reaction of Al powders is stronger. Second, the reaction rate of Al powders depends on pressure and Al content. Finally, the endothermic process of Al powders has a high contribution to the decrease in the work ability of RDX/Al instead of the gasconsumption mechanism of the Al reaction. More than half of the reaction heat of Al powders is used to heat itself, whereas the gas consumption during the reaction is negligible. |
| first_indexed | 2024-03-13T03:33:47Z |
| format | Article |
| id | doaj.art-ce3766c401cf4204a9a93d6bc0b56be4 |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-03-13T03:33:47Z |
| publishDate | 2023-06-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Defence Technology |
| spelling | doaj.art-ce3766c401cf4204a9a93d6bc0b56be42023-06-24T05:16:42ZengKeAi Communications Co., Ltd.Defence Technology2214-91472023-06-01243145Research of detonation products of RDX/Al from the perspective of compositionXing-han Li0Zhi-cong Yi1Qi-jun Liu2Fu-sheng Liu3Ze-teng Zhang4Shen-yuan Hou5Xian-xu Zheng6Xu Zhang7Hong-bo Pei8School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, China; National Key Laboratory for Shock Wave and Detonation Physics, Mianyang, 621900, ChinaSchool of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, ChinaSchool of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, ChinaSchool of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, ChinaSchool of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, ChinaSchool of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, ChinaNational Key Laboratory for Shock Wave and Detonation Physics, Mianyang, 621900, ChinaNational Key Laboratory for Shock Wave and Detonation Physics, Mianyang, 621900, ChinaNational Key Laboratory for Shock Wave and Detonation Physics, Mianyang, 621900, China; Corresponding author.Aluminized explosives exhibit excellent performance because the oxidation of aluminum (Al) powders enhances the pressure and temperature of detonation products. However, the equation of state (EOS) of detonation products has not been understood well. In the present study, we conducted long-time tests (approximately 1 ms) of a metal rod driven by detonation products of RDX, RDX/LiF, and RDX/Al. In addition, we used laser velocimetry (PDV) to measure the freesurface velocity of the rod. Thermochemical code DLCHEQ was successfully applied to the hydrodynamic program SSS to perform the rod-driven test, and a novel method was established to study the EOS of detonation products from the perspective of composition. The reliability of DLCEHQ was validated by a small deviation (<10%) between the experimental rod free-surface velocity of RDX and the calculated results; the deviation was considerably less than that from the results obtained using the JWL EOS and ideal-gas EOS. The endothermic process and the reaction of Al powders (Al+H2O+NO+CO2→CO+H2+N2+Al2O3) were analyzed by calculating the rod free-surface velocity of RDX/LiF and RDX/Al, respectively. The results of the present study demonstrated that the thermodynamic state of Al powders has notable influence on the EOS of aluminized detonation products, and the findings were compared with those of previous studies. First, the temperature equilibrium between Al powders and CHNO products is not always achieved, and the disequilibrium is more obvious when the reaction of Al powders is stronger. Second, the reaction rate of Al powders depends on pressure and Al content. Finally, the endothermic process of Al powders has a high contribution to the decrease in the work ability of RDX/Al instead of the gasconsumption mechanism of the Al reaction. More than half of the reaction heat of Al powders is used to heat itself, whereas the gas consumption during the reaction is negligible.http://www.sciencedirect.com/science/article/pii/S221491472200263XAluminized explosiveDetonation productsEOSRod-driven testCompositional evolution |
| spellingShingle | Xing-han Li Zhi-cong Yi Qi-jun Liu Fu-sheng Liu Ze-teng Zhang Shen-yuan Hou Xian-xu Zheng Xu Zhang Hong-bo Pei Research of detonation products of RDX/Al from the perspective of composition Defence Technology Aluminized explosive Detonation products EOS Rod-driven test Compositional evolution |
| title | Research of detonation products of RDX/Al from the perspective of composition |
| title_full | Research of detonation products of RDX/Al from the perspective of composition |
| title_fullStr | Research of detonation products of RDX/Al from the perspective of composition |
| title_full_unstemmed | Research of detonation products of RDX/Al from the perspective of composition |
| title_short | Research of detonation products of RDX/Al from the perspective of composition |
| title_sort | research of detonation products of rdx al from the perspective of composition |
| topic | Aluminized explosive Detonation products EOS Rod-driven test Compositional evolution |
| url | http://www.sciencedirect.com/science/article/pii/S221491472200263X |
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