| 吸气式激光推进中空气对CO_2激光的吸收系数计算 |
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| 引用本文： | 李倩,洪延姬,黄辉,曹正蕊.吸气式激光推进中空气对CO_2激光的吸收系数计算[J].装备指挥技术学院学报,2010,21(3):117-119. |
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| 作者姓名： | 李倩 洪延姬 黄辉 曹正蕊 |
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| 作者单位： | 1. 装备指挥技术学院基础部,北京,101416
2. 装备指挥技术学院研究生管理大队,北京,101416 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 比较分析了吸气式激光推进中空气对CO2激光的3种吸收机制,列出了相应的吸收系数计算公式。通过计算发现,自由-自由吸收对应的逆韧致吸收系数占总吸收系数的比例几乎达到80%,即在较强的激光辐照作用下,由于电子温度很高,高温空气主要通过逆韧致方式吸收入射激光能量。计算结果可以用于吸气式激光推进的能量沉积过程研究。
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| 关 键 词： | 吸气式激光推进 CO2激光 逆韧致吸收 吸收系数 |
Calculation of Absorption Coefficient of CO2 Laser by Air in Air-breathing Laser Propulsion |
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| LI Qian,HONG Yanji,HUANG Hui,CAO Zhengrui.Calculation of Absorption Coefficient of CO2 Laser by Air in Air-breathing Laser Propulsion[J].Journal of the Academy of Equipment Command & Technology,2010,21(3):117-119. |
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| Authors: | LI Qian HONG Yanji HUANG Hui CAO Zhengrui |
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| Affiliation: | 1.Department of Basic Theories,the Academy of Equipment Command ＆ Technology,Beijing 101416,China;2.Company of Postgraduate Management,the Academy of Equipment Command ＆ Technology,Beijing 101416,China) |
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| Abstract: | Three absorption mechanisms of CO2 laser by air in air-breathing laser propulsion are analyzed and compared,and corresponding absorption coefficient expressions are listed separately.Through calculation it is found that the proportion of inverse bremsstrahlung absorption coefficient to total absorption coefficient is almost up to 80%.That is,under stronger laser irradiation,for the electronic temperature is very high,and the incident laser energy is mainly absorbed by high-temperature air through inverse bremsstrahlung.Results of calculation can be applied in deposit process of air-breathing laser propulsion. |
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| Keywords: | air-breathing laser propulsion CO2 laser inverse bremsstrahlung absorption absorption coefficient |
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