中国激光, 2010, 37 (1): 100, 网络出版: 2010-01-16   

大气呼吸模式纳秒脉冲固体钕玻璃激光推进实验与数值模拟

Experimental and Numerical Study of Air-Breathing Mode Propulsion by Solid Nd:Glass Nanosecond Pulse Laser
作者单位
空军工程大学 电讯工程学院,陕西 西安 710077
摘要
采用1.06 μm纳秒脉冲固体钕玻璃激光器和K9玻璃材质铃形推进器开展了大气呼吸模式单脉冲竖直激光推进实验和相应的数值模拟研究。结果表明,纳秒脉冲激光推进中焦距在推进器构型因素中占主导地位,焦距越大,推进性能越好,焦距相同时,开口张角小、喷管长的推进器获得的冲量耦合系数越大,这与微秒脉冲CO2激光推进的结论不同。分析认为超短脉冲对推进器壁面的热损伤是短焦距推进器性能较差的真正原因。在18 J单脉冲激光作用下,12.5 g推进器被竖直推进24.5 mm,冲量耦合系数达到478.75 μNDK·sDK·J-1。通过与CO2激光推进实验结果比较分析发现,纳秒脉冲激光的单脉冲推进效果要优于微秒脉冲激光。
Abstract
With a 1.06 μm solid Nd:glass nanosecond pulse laser and a bell-shaped thruster made of K9 glass,both vertical single-pulse propulsion experiment and the corresponding numerical simulation are studied. The results show that,the focal length dominates among the structural factors of thruster in the propulsion by nanosecond pulse laser. The larger focal length corresponds to a better propulsion performance,and at the same focal length,the thruster with smaller open angle and longer scale can achieve higher impulse coupling coefficient,which are different from the results achieved in the propulsion by a microsecond pulse CO2 laser. It is believed that the reason for the poor performance of thruster with shorter focal length is the thermal damage of thruster caused by ultrashort pulse laser. The 12.5 g thruster is vertically propelled for a height of 24.5 mm by a 18 J single pulse laser,and its impulse coupling coefficient is 478.75 μNDK·sDK·J-1. By comparing with the experimental results based on the CO2 laser,the nanosecond pulse laser is better than the microsecond pulse laser in the single pulse propulsion.

石磊, 赵尚弘, 楚兴春, 吴继礼, 李晓亮, 李国杰. 大气呼吸模式纳秒脉冲固体钕玻璃激光推进实验与数值模拟[J]. 中国激光, 2010, 37(1): 100. Shi Lei, Zhao Shanghong, Chu Xingchun, Wu Jili, Li Xiaoliang, Li Guojie. Experimental and Numerical Study of Air-Breathing Mode Propulsion by Solid Nd:Glass Nanosecond Pulse Laser[J]. Chinese Journal of Lasers, 2010, 37(1): 100.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!