水下光纤纳秒激光推进的短微腔结构性能研究  

Performance of Short Micro-Cavity Structure for Underwater Fiber Nanosecond Laser Propulsion

作　　者：葛杨[1] 李寒阳 王鸿涛 唐显淇 周高仟 杨旭龙 Ge Yang;Li Hanyang;Wang Hongtao;Tang Xianqi;Zhou Gaoqian;Yang Xulong(College of Mechanical and Electrical Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China;College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China;Engineering Technology Department,Harbin Aircraft Industry Group Co.,Ltd.,Harbin 150066,Heilongjiang,China)

机构地区：[1]哈尔滨工程大学机电工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学物理与光电工程学院,黑龙江哈尔滨150001 [3]哈尔滨飞机工业集团有限责任公司工程技术部,黑龙江哈尔滨150066

出　　处：《光学学报》2024年第6期282-294,共13页Acta Optica Sinica

基　　金：国家自然科学基金(52271344);黑龙江省自然科学基金(LH2021E032)。

摘　　要：针对水下光纤激光推进中存在的冲量耦合系数小、效果发散的问题,提出了用于提升水下光纤激光推进性能的短微腔结构。文中利用Fluent对添加微腔后水下光纤激光推进的结果进行了数值模拟,分析了矩形微腔结构的直径和长度对推进的影响,并在矩形微腔基础上提出U形微腔、双管微腔及含有阻塞结构的微腔。通过仿真得到了不同微腔对推力和冲量耦合系数的增大效果,证明了添加微腔可使水下光纤激光推进的冲量耦合系数得到103数量级的增大,并通过对比得出4种微腔结构中,双管微腔的结构形态对激光推进的性能提升影响最大,提升效果最好。Objective Underwater laser plasma detonation wave propulsion technology has important application value in submarine stealth propulsion,detonation engine,supercavitation weapon systems,green ship manufacturing,and other fields.Different from the space focused laser induced propulsion method,the traditional laser propulsion system focuses on inherent defects such as insufficient energy gathering effect,difficult control of propulsion direction,and large laser loss.A new mode of underwater fiber laser induced plasma detonation wave propulsion is proposed,which achieves control of the laser focal point through the design of microcavity structure morphology coupled with fiber optics and research on the performance of fiber laser propulsion structure.Furthermore,the control of the movement direction of small particles entering and exiting can be achieved,which solves the problem of low energy coupling efficiency of laser plasma in underwater environments and difficulty in effectively applying propulsion force to the surface of the pushed object.By utilizing underwater plasma fiber laser induction to achieve directional propagation of detonation waves,we aim to improve the thrust and impulse coupling coefficient structural performance of laser propulsion.We focus on the morphology and energy conversion characteristics of fiber micro-cavity structures and the study provides theoretical support and guidance for future research on underwater laser induced plasma detonation wave dynamics while achieving particle targeting,fixedpoint,and fixed-depth propulsion.Methods We utilize the theory and method of directional propagation of detonation waves through underwater fiber laser induced plasma,aiming to improve the thrust and impulse coupling coefficient structural performance of laser propulsion.Meanwhile,for the microcavity structural performance of underwater fiber laser propulsion,we combine the analysis of laser plasmon detonation theory to build a microstructure underwater laser plasma propulsion model and numerical sim

关 键 词：激光光学 水下激光推进 微腔结构 性能优化 冲量耦合系数 

分 类 号：O439[机械工程—光学工程]