Numerical simulation of radiated noise during combustion of energetic materials in a closed bomb
| Autor: | Yuquan Wen, Shihui Xiong, Yu-jun Wu, Tuo Yang, Jingcheng Wang, Yuan Li |
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| Rok vydání: | 2022 |
| Předmět: |
0209 industrial biotechnology
Materials science Computer simulation business.industry Mechanical Engineering Metals and Alloys Computational Mechanics Shell (structure) 02 engineering and technology Mechanics Computational fluid dynamics Combustion 01 natural sciences Finite element method 010305 fluids & plasmas Noise 020901 industrial engineering & automation 0103 physical sciences Ceramics and Composites Sound pressure business Boundary element method |
| Zdroj: | Defence Technology. 18:1167-1178 |
| ISSN: | 2214-9147 |
| DOI: | 10.1016/j.dt.2021.05.013 |
| Popis: | In this study, based on a closed bomb test combined with computational fluid dynamics, a structural finite element method, and an acoustic boundary element method, a fluid-solid acoustic one-way coupling calculation model is established for the combustion process of energetic materials in a closed bomb, and the effectiveness of the model is verified by experiments. It is found that the maximum peak sound pressure increases exponentially with an increase in loading doses or gas pressure. However, a change in the combustion coefficient of the energetic materials has little effect on the noise generated during the combustion process in the closed bomb. When the combustion coefficient is reduced by a multiple of 16, the maximum transient sound pressure is reduced by 1.79 dB, and the sound pressure level in the frequency band is reduced by 1.75 dB. With an increase in shell thickness, the combustion noise of the energetic materials in the closed bomb decreases, and the reduction range of the combustion noise increases with the increase in shell thickness. |
| Databáze: | OpenAIRE |
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