Xian Mingchun, Zhao Kang, Liu Xuwen, Meng Yangang, Xie Junyao, Li Jingwei, Tong Lele, Huang Meng, Wu Lizhi
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Sichuan Aerospace Chuannan Pyrotechnics Co., Ltd., Luzhou 646000, China.
Micromachines (Basel). 2023 Apr 24;14(5):917. doi: 10.3390/mi14050917.
Miniaturized laser-initiated pyrotechnic devices have great application prospects in aerospace and modern weapon systems due to their excellent energy output performance and reliability. In order to develop a low-energy insensitive laser detonation technology based on a two-stage charge structure, it is important to deeply analyze the motion law of a titanium flyer plate driven by the deflagration of the first-stage charge (RDX). The effects of the charge mass of RDX, flyer plate mass, and barrel length on the motion law of flyer plates were studied through a numerical simulation method based on the Powder Burn deflagration model. The consistency between the numerical simulation and the experimental results was analyzed using the paired t confidence interval estimation method. The results show that the Powder Burn deflagration model can effectively describe the motion process of the RDX deflagration-driven flyer plate with a 90% confidence level, and its velocity error is ≤6.7%. The speed of the flyer plate is proportional to the mass of the RDX charge, inversely proportional to the mass of the flyer plate, and exponentially related to its moving distance. As the moving distance of the flyer plate increases, the RDX deflagration products and air in front of the flyer plate are compressed, which inhibits the motion of the flyer plate. In the optimum state (the mass of the RDX charge is 60 mg, the mass of the flyer is 85 mg, and the length of the barrel is 3 mm), the speed of the titanium flyer reaches 583 m/s, and the peak pressure of the RDX deflagration reaches 2182 MPa. This work will provide a theoretical basis for the refined design of a new generation of miniaturized high-performance laser-initiated pyrotechnic devices.
小型化激光引发烟火装置因其优异的能量输出性能和可靠性，在航空航天和现代武器系统中具有广阔的应用前景。为了开发基于两级装药结构的低能量钝感激光起爆技术，深入分析由一级装药（黑索今）爆燃驱动的钛飞片的运动规律至关重要。基于粉末燃烧爆燃模型，采用数值模拟方法研究了黑索今装药质量、飞片质量和药筒长度对飞片运动规律的影响。利用配对t置信区间估计方法分析了数值模拟与实验结果之间的一致性。结果表明，粉末燃烧爆燃模型能够以90%的置信水平有效描述黑索今爆燃驱动飞片的运动过程，其速度误差≤6.7%。飞片速度与黑索今装药质量成正比，与飞片质量成反比，且与其移动距离呈指数关系。随着飞片移动距离的增加，飞片前方的黑索今爆燃产物和空气被压缩，这抑制了飞片的运动。在最佳状态下（黑索今装药质量为60mg，飞片质量为85mg，药筒长度为3mm），钛飞片速度达到583m/s，黑索今爆燃的峰值压力达到2182MPa。这项工作将为新一代小型化高性能激光引发烟火装置的精细化设计提供理论依据。
