真空下激光烧蚀聚合物产生推力过程的数值研究  

Numerical Study of Thrust Generation from the Process of Laser Ablated Polymer in Vacuum

作　　者：李南雷[1] 金星[2] 王广宇[3] 叶继飞[3] 

机构地区：[1]装备指挥技术学院研究生管理大队,北京101416 [2]装备指挥技术学院航天装备系,北京101416 [3]装备指挥技术学院基础部,北京101416

出　　处：《装备指挥技术学院学报》2010年第6期124-127,共4页Journal of the Academy of Equipment Command & Technology

摘　　要：激光烧蚀聚合物靶材可产生微小推力，这一技术在微小卫星姿轨控应用中具有重要前景。基于实验总结的烧蚀率公式，提出了采用阈值能量模型来描述真空中激光烧蚀聚合物产生推力的过程，模型中以沉积能量为烧蚀判据，根据能量和动量守恒原理计算靶材获得的反喷冲量和其他推进参数。数值结果给出了靶材各项推进参数的变化规律，含能聚合物的推进性能明显高于非含能靶材，能量转化效率超过100％。Laser ablated polymers can generate micro thrust, and it has a good application prospects in attitude and orbit control system of micro satellites. The paper puts forward the threshold energy model to describe the process of thrust generation during laser ablated polymer in vacuum, uses laser deposition energy in polymer as ablation criterion, and calculates the recoil impulse and other thrust parameters based on the conservation theory. Numerical results reveal that the evolutive rule of impulse, thrust, impulse coupling coefficient and special impulse： the propulsion capability of exothermic polymer targets are better than endothermic ones, and its energy efficiency is larger than 100%.

关 键 词：激光微推进 聚合物烧蚀 阈值能量 反作用冲量 

分 类 号：O439[机械工程—光学工程] TN249[理学—光学]