炸药柱限定性热爆炸实验研究

Study on Limited Thermal Explosion Experiment for Explosive Cylinder

在Frank kamenetskii热平衡方程基础上建立了二个 12 .7mm× 2 5 .4mm炸药柱的限定性热爆炸实验装置、实验条件和实验方法 ,用于测定限定性热爆炸临界温度、反应延滞期 ,评价限定性热爆炸实验的反应水平。对于PBX 1炸药 ,限定性热爆炸的临界温度为 189 5℃ ,而Φ30mm× 30mm的炸药柱非限定热爆炸的临界温度为 197 5℃ ,表明在限定性体系中 ,由于炸药柱限定在金属铝的反应器里 ,热分解产物不易逸出 ,热量不易向环境传递 ,比非限定性体系易达到热爆炸临界条件 ,使热爆炸临界温度降低。此外 ,在相同环境温度下 ,PBX 6炸药柱的热爆炸延滞期比PBX 1炸药柱短 ,表明PBX 6炸药柱的热感度高 。

We set up two limited thermal explosion test equipment,condition and method of explosive cylinder of Φ12.7mm×25.4mm on the base of the Frank kamenetskii heat equilibration formula,to test the critical temperature and reaction delay time of limited thermal explosion,and evaluate its reaction level.For the PBX 1 explosive,its limited thermal explosion critical temperature is 189.5℃,and its unlimited thermal explosion critical temperature of Φ30mm×30mm explosive cylinder is 197.5℃.This is showed:in the limited system,the explosive cylinder's thermal decomposition product is not easy to come out and the heat is not easy to convey to environment because they are confined in the AL reactor.It is easier to reach the thermal explosion critical condition than the unlimited system,this decreases the thermal explosion critical temperature.In addition,PBX 6 explosive cylinder's thermal explosion delay time is short than the PBX 1 explosive cylinder at the same temperature environment.This is showed that PBX 6 explosive cylinder's heat sensitivity is high and hence its security is low.