纳秒脉冲激光辐照铝靶碎片动态响应的仿真研究  

Numerical simulation of dynamic response for aluminum target debris irradiated by nanosecond pulse laser

作　　者：张萌 方英武 张广鹏[1] ZHANG Meng;FANG Yingwu;ZHANG Guangpeng(School of Mechanical and Precision Instrument Engineering,Xi’an University of Technology,Xi’an 710048,China;School of Engineering,Xi’an International University,Xi’an 710077,China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048 [2]西安外事学院工学院,西安710077

出　　处：《激光技术》2023年第4期541-546,共6页Laser Technology

基　　金：国家自然科学基金资助项目(61875231)。

摘　　要：为了研究纳秒脉冲激光与铝靶碎片的相互作用规律,建立了纳秒脉冲激光辐照铝靶碎片的动态响应仿真模型,采用COMSOL软件分析了不同作用时间和不同入射激光功率下的等离子体反喷羽流动力学特性,得到了不同激光参数变化对脉冲激光辐照铝靶碎片产生等离子体反喷羽流的演化规律。结果表明,相同脉冲激光功率作用下等离子体羽流反喷速度随作用时间的增加而增大;相同脉冲激光时间作用下,随着激光功率增加,等离子体反喷羽流的最大速度也不断增大;由于受等离子体屏蔽效应的影响,反喷羽流速度在25μs附近达到最大,在700 kW时最大速率为1.87×104 m/s,此时等离子体反喷羽流扩散半径增加了17 mm。该研究为纳秒脉冲激光辐照铝靶空间碎片降轨移除工程化应用提供了理论参考。To study the interaction pattern of nanosecond pulse laser with aluminium debris,a dynamic response model of nanosecond pulse laser irradiation on aluminum debris was established,the dynamic characteristics of plasma expansion plumes under different action times and incident laser powers was investigated by COMSOL software,and the evolution rules of plasma expansion plumes generated by nanosecond pulse laser irradiating the debris were obtained with different laser parameters.The results show that the expansion velocity of plasma plumes increases with the increase of action times based on the same pulse laser power.At the same time,the maximum velocity of plasma expansion plumes increases with the increase of laser powers based on the same pulse laser time.According to the given conditions of this article,the maximum velocity of expansion plumes reached the maximum around 25μs,and the maximum velocity at 700 kW is 1.87×104 m/s owing to the plasma shielding effect.At the moment,the diffusion radius of the plasma expansion plumes increases by 17 mm.The study provides a theoretical reference for the engineering application of nanosecond pulse laser irradiation of aluminium space debris de-orbiting removal.

关 键 词：激光技术 等离子体羽流 数值模拟 反喷速度 空间碎片 

分 类 号：TN249[电子电信—物理电子学]