TNT 后燃反应的水下爆炸实验研究与数值模拟

摘要

To explore the afterburning reaction of TNT explosive,the underwater explosion method and an experimental device designed to enhance the afterburning reaction of explosives were used to inves-tigate the energy output structure,and the afterburning reaction energy in different ambient atmos-phere was calculated.The experimental data of afterburning reaction was simulated by using Miller energy release model.The results show that the experimental device filled with oxygen or air can increase the afterburning reaction energy output of TNT explosive significantly.The measured after-burning reaction energy increases with the increase of the content of oxygen,and in the studied range, the afterburning reaction energy reaches the maximum value of 4.90 kJ/g,but does not reach the theo-retically maximum value.The computed shock wave pressure histories agree with the measured ones well,which indicates that the Miller energy release model is practicable.%为了研究 TNT 炸药的后燃反应，采用水下爆炸实验方法和一种增强炸药后燃反应的实验装置，对 TNT 炸药的能量输出结构进行了研究，计算得到了不同气体氛围下的后燃反应能量。采用 Miller 能量释放模型，对后燃反应实验结果进行了数值模拟。结果表明：在实验装置中充入空气或氧气，可明显增强 TNT 炸药的后燃反应能量输出，实测的后燃反应能量随着氧含量的增加而增大，在实验研究范围内后燃反应能量的最大值达到4．90 kJ/g，但并没有达到后燃反应能量的理论最大值；冲击波压力时程曲线的数值模拟结果与实验结果基本一致，证明了 Miller 能量释放模型的可行性。