固体发动机尾焰近红外高光谱计算与仿真

发布时间：2018-01-07 10:02

本文关键词：固体发动机尾焰近红外高光谱计算与仿真　出处：《光谱学与光谱分析》2017年09期 　论文类型：期刊论文

【摘要】：首先介绍固体发动机尾焰中钾原子的来源及其在尾焰中的辐射机理,并基于原子谱线理论对尾焰钾共振双线的光谱线型特征进行分析。然后,采用理想模型及半经验公式法对尾焰流场分布进行数值模拟,通过尾焰的流场参数使用C-G近似法数值计算尾焰钾共振双线的辐射特性。最后,利用大气辐射传输模型计算尾焰中钾共振双线辐射信号经过大气传输后到达探测系统的光谱特征。结果表明,该方法能有效地仿真计算尾焰近红外钾线高光谱精细结构。仿真结果亦表明钾共振双线光谱信号能有效通过大气传输,可作为尾焰探测识别的依据。
[Abstract]:The origin of potassium atom in the tail flame of solid motor and its radiation mechanism in the tail flame are introduced firstly. The spectral profile of the potassium resonance double line in the tail flame is analyzed based on the atomic line theory. An ideal model and semi-empirical formula method are used to simulate the flow field distribution of the tail flame. The radiation characteristics of the potassium resonance double lines of the tail flame are calculated by C-G approximation method through the flow field parameters of the tail flame. The atmospheric radiation transfer model is used to calculate the spectral characteristics of the potassium resonance two-line radiation signal in the tail flame after it is transmitted through the atmosphere to the detection system. This method can effectively simulate and calculate the hyperspectral fine structure of the tail flame near infrared potassium line. The simulation results also show that the potassium resonance two-line spectral signal can be effectively transmitted through the atmosphere and can be used as the basis for the detection and identification of the tail flame.
【作者单位】：桂林电子科技大学电子工程与自动化学院;广西高校光电信息处理重点实验室(桂林电子科技大学);中国科学院安徽光学精密机械研究所;
【基金】：国家自然科学基金项目(41201342) 广西自然科学基金项目(2013GXNSFAA019328) 广西自动检测技术与仪器重点实验室基金项目(YQ14101) 桂林电子科技大学创新团队项目资助
【分类号】：O433
【正文快照】： 引言由于固体发动机推进剂中普遍存在钾盐,因此在其尾焰辐射光谱中存在近红外钾共振双线(766.5和769.9nm)辐射信号。钾共振双线处在氧气的A吸收带中,具有大气吸收小、太阳背景干扰小等优点[1]。近年来,国外科学家积极开展尾焰钾共振双线的探测研究,并研制相关探测设备[2-3]。

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