激光强度对含能材料点火的影响

Effect of Laser Intensity on Ignition of Energetic Materials

从激光点火的热作用机理出发，运用传热理论，采用简化模型和近似方法，分析推导激光强度对含能材料点火的影响，得出激光二极管点火时间 ｔｉ 与激光功率密度 Ｉ０ 的关系，进而得到激光二级管点火能量 Ｅｉ 与 Ｉ０ 的关系，并和实验结果作了比较。结论： Ｅｉ 随 Ｉ０ 的增大而变小，理论与实验结果较吻合。

To analyze and to deduce the effect of laser intensity on ignition of energetic materials,according to the thermal mechanism of laser ignition,the relation between laser diode ignition time t i and laser power density I 0 is obtained by applying thermal transmission theory,simplified model as well as approximate method.Further more the relation between ignition energy E i and I 0 is also obtained.It is found that ignition energy decreases when I 0 increases.The results of theoretical analysis are in accord with that of experiments.