专用炸药慢速烤燃数值模拟与试验研究

Numerical Simulationg And Exoerimental Study on Slow

摘要:

慢速烤燃试验是由热爆炸理论发展而来的一类专门用来评估炸药在受到外界热刺激时响应特性的试验方法。慢速烤燃试验仅能得到炸药内部有限固定测量点的热反应特性而无法得到炸药内部其他部分的变化情况,而采用数值模拟的方法可以直接地获得计算区域内部任一点或面上的温度,从而弥补试验的不足。本文基于某水雷专用炸药,采用数值模拟方法研究了6kg和100kg级装药壳体在慢速升温环境下的热安全性,并与试验结果进行对比分析,发生响应时两者温度误差分别为3.43%和4.49%,验证了该数值计算方法的可行性,为慢速烤燃试验的点火温度及位置的预测提供了理论支撑。

关键词:慢速烤燃试验;炸药安全性;数值模拟

Abstract:

Slow burning test is a type of test method developed from thermal explosion theory specifically for evaluating the response characteristics of explosives under external thermal stimulation. The slow burning test can only obtain the thermal reaction characteristics of a limited number of fixed measurement points inside the change in explosive, and cannot obtain the changes in other parts inside the explosive. However, using numerical simulation methods can directly obtain the temperature at any point or surface inside the calculation area, thus compensating for the shortcomings of the test. This article is based on a specific explosive and uses numerical simulation methods to study the thermal safety of 6kg and 100kg level charge shells in a slow heating environment. The results are compared and analyzed with experimental data, and the temperature errors of the two during response are 3.43% and 4.49%, respectively. This verifies the feasibility of the numerical calculation method and provides theoretical support for predicting the ignition temperature and position of slow burning test.

Key words:Slow burning test; Safety of explosives; Numerical simulation