1. 北京理工大学 机电动态控制重点实验室, 北京 100081
2. 北京理工大学 唐山研究院, 河北 唐山 063699
*邮箱: laserchm@126.com
收稿:2022-03-03,
网络出版:2023-08-07,
纸质出版:2023-07-30
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Huimin CHEN, Pengyu GUO, Chengyi LIU, et al. Modeling and Simulation of Pulsed Laser Ignition Based on Thermal Ignition Mechanism[J]. Acta Armamentarii, 2023, 44(7): 1930-1937.
陈慧敏, 郭鹏宇, 刘承益, 等. 基于热点火机理的脉冲激光点火建模及仿真[J]. 兵工学报, 2023,44(7):1930-1937. DOI: 10.12382/bgxb.2022.0125.
Huimin CHEN, Pengyu GUO, Chengyi LIU, et al. Modeling and Simulation of Pulsed Laser Ignition Based on Thermal Ignition Mechanism[J]. Acta Armamentarii, 2023, 44(7): 1930-1937. DOI: 10.12382/bgxb.2022.0125.
为研究脉冲激光点火系统中电学参数对点火延迟时间的影响规律
建立脉冲激光点火模型
重点对脉冲激光激励阶段和激光点火阶段进行建模仿真。以BNCP起爆药为例
在脉冲激光激励阶段仿真中
采用电学仿真软件模拟激光驱动电路激励半导体激光器发射激光过程
通过改变储能电容和激光器放电回路电阻的数值
得到不同时刻对应的激光器输出功率;在激光点火阶段仿真中
将脉冲激光激励阶段中仿真得到的不同仿真步长对应的激光器输出功率导入有限元仿真软件
求解得到不同电学参数对应的激光点火延迟时间规律。仿真结果表明:增大驱动电路中的储能电容会加大激光器输出的平均功率
缩短点火延迟时间;增加回路电阻会降低激光器输出的峰值功率
进而增加点火延迟时间。搭建了脉冲激光点火测试平台
得到了不同电容参数下的点火延迟时间
实验验证了所建模型的正确性
为脉冲激光点火系统设计提供了一定的参考依据。
To study the influence of electrical parameters on the ignition delay time in the pulsed laser ignition system
a pulsed laser ignition simulation model is designed
and especially
the modeling and simulation of the pulsed laser excitation stage and the laser ignition stage are performed. Taking BNCP detonating agent as an example
an electrical simulation software is used to simulate the laser emission process of the semiconductor laser excited by the laser driver circuit in the simulation of the pulsed laser excitation stage. By changing the values of the energy storage capacitor and the resistance of the laser discharge circuit
the corresponding laser output power at different times is obtained. In the the laser ignition stage
the laser output power corresponding to different simulation steps obtained in the pulsed laser excitation stage is imported into the finite element simulation software
and the laser ignition delay time law corresponding to different electrical parameters is solved. The simulation results show that: the average output power of the laser increases and the ignition delay time is shortened by increasing the energy storage capacitance in the driver circuit; increasing circuit resistance leads to the reduction of the peak output power of the laser and the increase of the ignition delay time. The experiments has verified the simulation model. The established pulsed laser ignition model can provide theoretical reference for the hardware design of the pulsed laser ignition system.
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