Numerical simulations of trajectories of shock wave triple points in near-ground explosions of TNT charges
To accurately predict the locations and trajectories of shock wave triple points in near-ground explosions, this study determined the propagation law of shock waves after the initiation of a detonator using a schlieren system. Moreover, it established a numerical simulation model using the Autodyn s...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2022-06-01
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| Series: | Energetic Materials Frontiers |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666647222000331 |
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| author | Xing-long Li Xiang Wang Zhong-hua Lu Ming Li Wei Cao Ke-quan Chen Peng-yi Xue Heng-jian Huang Cheng Hua Da-yuan Gao |
| author_facet | Xing-long Li Xiang Wang Zhong-hua Lu Ming Li Wei Cao Ke-quan Chen Peng-yi Xue Heng-jian Huang Cheng Hua Da-yuan Gao |
| author_sort | Xing-long Li |
| collection | DOAJ |
| description | To accurately predict the locations and trajectories of shock wave triple points in near-ground explosions, this study determined the propagation law of shock waves after the initiation of a detonator using a schlieren system. Moreover, it established a numerical simulation model using the Autodyn software and verified the accuracy of the model through a detonator explosion experiment. The propagation law of shock waves of TNT charges (1, 10 kg and 100 kg) at different heights of burst(0.5, 1.0, 1.5, 2.0 m,and 2.5 m) was studied through numerical simulations, and the triple point trajectories were fitted to an empirical formula. The results show that the maximum simulation error relative to the schlieren images of detonator explosions did not exceed 4 mm. As the scaled height of burst decreased, the positions of generated triple points were closer to the vertical projection of the explosion center and rose faster. As the scaled distance increased, the scaled height of triple points rose exponentially. The average error of triple point trajectories between the values predicted in this study and the experimental values was 4.1%, indicating that the accuracy of the fitted formula is acceptable. This study revealed the overpressure distribution law of shock waves and will provide a reference for shock wave overpressure measurements and explosion protection. |
| first_indexed | 2024-04-10T18:29:11Z |
| format | Article |
| id | doaj.art-bd0b77013ad14d84a23abc162cc93513 |
| institution | Directory Open Access Journal |
| issn | 2666-6472 |
| language | English |
| last_indexed | 2024-04-10T18:29:11Z |
| publishDate | 2022-06-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Energetic Materials Frontiers |
| spelling | doaj.art-bd0b77013ad14d84a23abc162cc935132023-02-02T04:50:16ZengKeAi Communications Co. Ltd.Energetic Materials Frontiers2666-64722022-06-01326167Numerical simulations of trajectories of shock wave triple points in near-ground explosions of TNT chargesXing-long Li0Xiang Wang1Zhong-hua Lu2Ming Li3Wei Cao4Ke-quan Chen5Peng-yi Xue6Heng-jian Huang7Cheng Hua8Da-yuan Gao9Institute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, ChinaInstitute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, ChinaInstitute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, ChinaInstitute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, ChinaInstitute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Corresponding authors.Institute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, ChinaInstitute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, ChinaInstitute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, ChinaInstitute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, ChinaInstitute of Chemical Materials, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Robust Munitions Center, China Academy of Engineering Physics(CAEP), Mianyang, 621999, China; Corresponding authors.To accurately predict the locations and trajectories of shock wave triple points in near-ground explosions, this study determined the propagation law of shock waves after the initiation of a detonator using a schlieren system. Moreover, it established a numerical simulation model using the Autodyn software and verified the accuracy of the model through a detonator explosion experiment. The propagation law of shock waves of TNT charges (1, 10 kg and 100 kg) at different heights of burst(0.5, 1.0, 1.5, 2.0 m,and 2.5 m) was studied through numerical simulations, and the triple point trajectories were fitted to an empirical formula. The results show that the maximum simulation error relative to the schlieren images of detonator explosions did not exceed 4 mm. As the scaled height of burst decreased, the positions of generated triple points were closer to the vertical projection of the explosion center and rose faster. As the scaled distance increased, the scaled height of triple points rose exponentially. The average error of triple point trajectories between the values predicted in this study and the experimental values was 4.1%, indicating that the accuracy of the fitted formula is acceptable. This study revealed the overpressure distribution law of shock waves and will provide a reference for shock wave overpressure measurements and explosion protection.http://www.sciencedirect.com/science/article/pii/S2666647222000331Shock waveMach reflectionTriple pointNumerical simulationTNT charge |
| spellingShingle | Xing-long Li Xiang Wang Zhong-hua Lu Ming Li Wei Cao Ke-quan Chen Peng-yi Xue Heng-jian Huang Cheng Hua Da-yuan Gao Numerical simulations of trajectories of shock wave triple points in near-ground explosions of TNT charges Energetic Materials Frontiers Shock wave Mach reflection Triple point Numerical simulation TNT charge |
| title | Numerical simulations of trajectories of shock wave triple points in near-ground explosions of TNT charges |
| title_full | Numerical simulations of trajectories of shock wave triple points in near-ground explosions of TNT charges |
| title_fullStr | Numerical simulations of trajectories of shock wave triple points in near-ground explosions of TNT charges |
| title_full_unstemmed | Numerical simulations of trajectories of shock wave triple points in near-ground explosions of TNT charges |
| title_short | Numerical simulations of trajectories of shock wave triple points in near-ground explosions of TNT charges |
| title_sort | numerical simulations of trajectories of shock wave triple points in near ground explosions of tnt charges |
| topic | Shock wave Mach reflection Triple point Numerical simulation TNT charge |
| url | http://www.sciencedirect.com/science/article/pii/S2666647222000331 |
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