【摘要】 为揭示激光烧蚀金属推进过程中多物理场耦合机制对推进性能的影响规律，以Fe,Al,Cu三种常见金属为研究对象，基于COMSOL Multiphysics软件构建激光烧蚀推进数值模型。通过该模型系统分析光吸收、热传导、相变、等离子体演化等多物理场的耦合路径与作用规律，探究三种金属在不同激光参数下的烧蚀特性，并揭示金属材料属性（如烧蚀潜热、热导率等）对多物理场演化及推力输出的影响机制。结果表明，在相同激光能量密度条件下，Fe的冲量耦合系数最大，Al的比冲最大且烧蚀效率最高；金属材料的推进性能不仅受金属种类的显著影响，还与激光能量密度呈非线性变化关系。研究可为激光烧蚀推进剂选型优化及推进效率提升提供理论支撑。更多还原

【Abstract】 To reveal the influence patterns of multiphysics coupling mechanisms on propulsion performance during laser ablation of metals,takes three common metals,Fe,Al,and Cu,as research objects and constructs a laser ablation propulsion numerical model based on COMSOL Multiphysics software.Through this model,the coupling pathways and action rules of various physical fields such as light absorption,heat conduction,phase change,and plasma evolution are systematically analyzed,exploring the ablation characteristics of the three metals under different laser parameters and revealing the influence mechanisms of metal material properties(such as ablation latent heat and thermal conductivity)on multiphysics evolution and thrust output.The results show that under the same laser energy density,Fe has the highest impulse coupling coefficient,Al has the highest specific impulse and ablation efficiency;the propulsion performance of metal materials is not only significantly affected by the type of metal but also varies nonlinearly with the laser energy density.The study can provide theoretical support for optimizing the selection of laser ablation propellants and improving propulsion efficiency.更多还原