温度和湿度对发射药自燃的影响

Effect of Temperature and Humidity on Thermal Self-ignition of Propellant

为了解环境温度和湿度对发射药热自燃规律的影响,以某单基发射药为例,在实验室中进行小型实验。采用均热块模拟加热、加湿法,选用不同直径的反应器,改变反应器中发射药所处环境温度和湿度,得到温度-湿度-自燃时间数据。结果表明,均热块温度越高,单基发射药的自燃时间就越短;当均热块温度一定,绝对湿度从相对较小值逐渐增大时,单基发射药的自燃时间先是变短,当达到最小值后又逐渐变长,直到发射药不自燃。表明湿度对单基发射药自燃规律的影响显著。

In order to investigate the influence of the environment, including the temperature and the humidity, on the self-ignition hazard in ammunition, taking the certain single base propellant as an example, a small-scale test is carried out in the laboratory. The single base propellant is placed in the conditions of changing the temperature value and the humidity value of the environment. The relation among environment temperature, humidity and selfignition time is obtained. The results show that the higher the hot piece temperature, the shorter the self-ignition time of the single base propellant. Under the condition of the constant temperature of the hot piece when the absolute humidity enlarges from a relatively minor value, the self-ignition time of the single base propellant became short first, then became long after the minimal value appeared, at last, the self-ignition would not happen, indicating that the influence of humidity is obvious.