大气吸气模式激光推进的实验研究  

Experimental Investigation on Air-Breathing Mode of Laser Propulsion

作　　者：唐志平[1] 龚平[1] 胡晓军[1] 蔡健[1] 谭荣清[2] 吕岩[2] 

机构地区：[1]中国科学技术大学力学与机械工程系中科院材料力学行为和设计重点实验室,安徽合肥230026 [2]中国科学院电子学研究所高功率激光技术部,北京100080

出　　处：《航空学报》2005年第1期13-17,共5页Acta Aeronautica et Astronautica Sinica

基　　金：国家973计划资助项目

摘　　要：激光推进是一种新概念推进技术,在未来航天事业中将有重要的应用前景。利用高重复频率高功率TEA CO2脉冲激光器进行了抛物形飞行器的水平和垂直激光推进实验,实现了大气模式的激光垂直推进,飞行高度超过了1m。实验测定了多种工作状况下光脉冲能量转变为飞行器动量的推进效能,测得的光能-冲量耦合系数Cm达到27 7dyne·s/J,与国外文献报道相当。The recent progress in the authors experimental investigation on air-breathing mode of laser propulsion are reported. With a high power TEA-CO2 pulsed laser, both horizontal and vertical propulsion experiments are conducted. The energy of each pulse is about 18.58J. The frequency can be adjusted from 20 to 180Hz. Several parabolic reflectors of aluminum alloy with different focuses f are used in the experiments. A high speed CCD camera is applied to record the movement variables of the reflectors. For single pulse experiments, the measured momentum coupling coefficients Cm are 27.7dyne · s/J for f= 10mm and 22.82dyne · s/ J for f= 15mm. For multi-pulse experiments （frequency 50Hz, work time 0.5s）, the horizontal propulsion distance is greater than 1.5m, and the vertical propulsion height exceeds lm.

关 键 词：航空 航天推进系统 激光推进 TEA—CO2激光器 大气吸气模式 冲量耦合系数 

分 类 号：V439.3[航空宇航科学与技术—航空宇航推进理论与工程]