利用单色谱仪、压力传感器和示波器等组成的单色谱瞬态测试系统研究了苯的快速反应光谱及点火特性.由于苯在冲击波的作用下极易发生高温分解,介绍了一种在入射激波条件下确定含能材料冲击点火延迟时间和防止提前触发的新方法。运用反应动力学程序模拟出主要生成物(C2)浓度随时间的变化关系,结合谱仪记录的该生成物随时间变化的信号曲线,对两条曲线的起跳点,最大波峰进行比较.模拟结果与测定的出现时间符合得较好,证明该单色谱瞬态测试系统能够较好的研究冲击发射光谱的时间分辨特性.把光谱实验和化学反应动力学相结合分析了苯在快速反应过程中碳的生成机理。

An instantaneous spectrum detection apparatus, consisting of monochromator, piezoelectric pressure sensor and oscilloscope was applied to study quick reaction and ignition delay time of benzene. On account of the pyrolysis of benzene easily driven under shock compression, a new method was introduced to determine ignition delay time of energetic materials and prevent advance trigger under incident shock wave. Comparison of calculated concentration of major species (C2) by the chemical kinetic program plotted against time with the experimental data recorded by oscilloscope. A fairly good agreement between calculated results and recorded data was obtained. It proved that using this apparatus can study the behavior of instantaneous emission spectrum preferably. Combination of experiment and chemical kinetic analyzed the reaction mechanism of formation of carbon in thermal decomposition process under shock wave.