摘要
对发射药热自燃现象进行了数值模拟研究。通过与在实验室中进行的小模型实验及在野外进行的大模型实验结果的比较，确定了发射药热自燃的反应模型；在此基础上，通过数值模拟研究了直径和壁面温度对发射药热自燃的影响规律。结果发现：实验段四周壁面温度越高、实验段直径越大，发射药越容易自燃；发射药Ｎｏ．１比发射药Ｎｏ．２更容易发生热自燃。还预测了在各种温度条件下，发射药Ｎｏ．１与发射药Ｎｏ．２可能发生热自燃的直径范围。
The selfignition hazard in ammunition is simulated numerically. The numerically calculated results are compared with experimental data for small laboratory models and for large models tested outside to determine which chemical reaction model is most appropriate for the ammunition. In addition, the conditions for selfignition of the ammunition are studied numerically. It is found that increasing the wall temperature of the cylinder or increasing the cylinder diameter increases the probability of selfignition and that the No.1 ammunition is more likely to selfignite than the No.2 ammunition. For the No.1 ammunition, when the initial temperature of the ammunition is 20℃ and the wall temperature is 100℃, the ammunition may selfignite when the diameter is larger than 220mm. For the No.2 ammunition, when the initial temperature of the ammunition is 20℃ and the wall temperature is 100℃, the ammunition may selfignite when the diameter is larger than 280mm.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第7期78-81,共4页
Journal of Tsinghua University(Science and Technology)
关键词
发射药
热自燃
数值模拟
内热源
ammunition
selfignition
numerical simulation
internal heat sources
