化学放热系统环境温度和热爆炸延滞期的关系

Relationship between Ambient Temperature and Time to Ignition of Exothermic System

以边缘超临界化学放热系统的"平方根反比定律"为理论基础,通过分析绝热系统热爆炸延滞期的定义,得出了绝热系统热爆炸延滞期在边缘超临界条件下的新计算方法。以此为基础,应用LambertW函数得出了均温系统和非均温系统在边缘超临界条件下的环境温度和热爆炸延滞期之间的函数关系。进而定义和计算了含能材料的高温点火可靠度。结果表明:边缘超临界化学放热系统的超临界环境温度和热爆炸延滞期之间的函数关系不是简单的数学函数,而是由化学放热系统的活化能、指前因子、反应热、比热容、密度等物化参数决定的复杂函数。

On the basic of ＂time to ignition and degree of super criticality law＂, a kind of new calculation method of scale time of adiabatic explosion under the marginally supercritical condition was worked out. Based on that and with application of Lambert W function, the function of ambient temperature and time to ignition of marginally supercritical system, under uniform and distributed temperatures were worked out. The definition and calculation of high temperature ignition reliability of energetic materials were given. Results show that the relationship between supercritical ambient temperature and time to ignition of marginally supercritical exothermic system is a function, which is decided by activation energy, frequency factor, quantity of reaction heat, specific heat, density and other physical and chemical parameters of exothermic system.