Chen Shihu, Liu Wei, Mu Chaomin
Pan Er Mine of Huaihe Energy Group, Huainan 232088, China.
Institute of Engineering Safety and Disaster Prevention, Hohai University, Nanjing 210098, China.
Materials (Basel). 2023 Jun 26;16(13):4608. doi: 10.3390/ma16134608.
The propagation laws of explosion shock waves and flames in various chambers were explored through a self-built large-scale gas explosion experimental system. The propagation process of shock waves inside the cavity was explored through numerical simulation using Ansys Fluent, and an extended study was conducted on the wave attenuation effect of multiple cavities connected in a series. The findings show that the cavity's length and diameter influenced the weakening impact of shock waves and explosive flames. By creating a reverse shock wave through complicated superposition, the cavity's shock wave weakening mechanism worked. By suppressing detonation creation inside the cavity, the explosive flame was weakened by the cavity's design. The multi-stage cavity exhibited sound-weakening effects on both shock waves and explosive flames, and an expression was established for the relationship between the suppression rate of shock force and the number of cavities. Diffusion cavities 35, 55, 58, and 85 successfully suppressed explosive flames. The multi-stage cavity efficiently reduced the explosion shock wave. The flame suppression rate of the 58-35 diffusion cavity explosion was 93.38%, whereas it was 97.31% for the 58-35-55 cavity explosion. In engineering practice, employing the 58-58 cavity is advised due to the construction area, construction cost, and wave attenuation impact.
通过自行搭建的大型气体爆炸实验系统，研究了爆炸冲击波和火焰在不同腔体内的传播规律。利用Ansys Fluent通过数值模拟研究了腔内冲击波的传播过程，并对串联连接的多个腔体的波衰减效应进行了扩展研究。研究结果表明，腔体的长度和直径影响冲击波和爆炸火焰的减弱效果。通过复杂叠加产生反向冲击波，腔体的冲击波减弱机制起作用。通过抑制腔内爆轰的产生，腔体的设计减弱了爆炸火焰。多级腔体对冲击波和爆炸火焰均表现出消声效果，并建立了冲击波抑制率与腔体数量之间的关系表达式。扩散腔35、55、58和85成功抑制了爆炸火焰。多级腔体有效降低了爆炸冲击波。58 - 35扩散腔爆炸的火焰抑制率为93.38%，而58 - 35 - 55腔爆炸的火焰抑制率为97.31%。在工程实践中，考虑到建筑面积、建造成本和波衰减影响，建议采用58 - 58腔体。
