激光与光电子学进展, 2013, 50 (12): 123001, 网络出版: 2013-11-19  

高温气体分子光谱系数计算方法研究

Calculation of Spectral Coefficientfor Molecules in High Temperature Gas
作者单位
1 装备学院研究生管理大队, 北京 101416
2 装备学院航天指挥系, 北京 101416
摘要
为研究飞行器在高超声速飞行时其表面高温气体的光谱特性,提出一种高温气体分子光谱系数计算的实用方法。通过对飞行器表面研究区域内高温气体分子各能级的数密度进行计算,研究分子跃迁谱线的增宽效应,基于HITRAN数据库获取所需光谱参数,最后采用逐线计算法对气体分子的光谱系数进行计算。该方法能够有效计算高温气体在不同波数下的光谱系数,其结果能够为分析高超声速飞行器气动流场和目标光谱辐射特性提供重要的计算参数,进而为研究其热防护及光学探测提供数据支持。
Abstract
In order to study spectral properties of high temperature gas around the surface of aircraft in hypersonic speed, we propose a practical calculation method of spectral coefficient for high temperature gas molecules. By calculating the energy level population of high temperature gas molecules in the studied area of the aircraft, the broadening effect of spectral line is studied and the spectral parameter required is obtained based on the HITRAN database. Finally, the spectral radiation coefficient of the gas molecules is calculated by line-by-line method. The method can calculate the spectral coefficient of high temperature gas at corresponding wavelength effectively, and thus providing the important calculating parameters to analyze the aerodynamic flow field of hypersonic aircraft and the spectral radiation properties of the target. Furthermore, it can provide supporting data for the study of aircraft thermal protection and optical detection.
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赵阳生, 杜小平. 高温气体分子光谱系数计算方法研究[J]. 激光与光电子学进展, 2013, 50(12): 123001. Zhao Yangsheng, Du Xiaoping. Calculation of Spectral Coefficientfor Molecules in High Temperature Gas[J]. Laser & Optoelectronics Progress, 2013, 50(12): 123001.

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