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文中针对高超声速绕流场中驻点线上的CO2气体展开了辐射光谱的相关研究,分析了CO2对整个高超声速目标的红外辐射产生的影响。研究了以球体作为飞行本体,通过计算流体力学的方法,描述高超声速流场中驻点线的物理状态以及CO2的含量变化。以此为基础,通过逐线法计算了不同飞行条件下绕流场中驻点线上CO2的辐射光谱。估算了发生烧蚀现象时,CO2的辐射光谱。通过理论计算,发现在典型的高超声速飞行状态下,无烧蚀的纯空气高超声速流场中驻点线上CO2的红外辐射远小于飞行器本体的红外辐射。而在有烧蚀的情况下,激波层中的CO2的红外辐射将不可忽略。
In this paper, the emission spectra of CO2 gas on the stagnation line in the hypersonic flow field are analyzed. The influence of CO2 on the infrared radiation of the hypersonic target is analyzed. The sphere as the ontology is studied. The computational fluid dynamics method is used to describe the physical state of the stationary line in the hypersonic flow field and the variation of CO2 content. Based on this, the emission spectra of CO2 on the stationary line around the flow field under different flight conditions were calculated by the line-by-line method. The CO2 emission spectrum was estimated when ablation occurred. Through theoretical calculations, we found that under typical hypersonic flight conditions, the infra-red CO2 radiation on the stationary line in the hypereutectic flow field without ablation is much smaller than the infrared radiation of the aircraft body. In the case of ablation, the CO2 layer in the shock wave of infrared radiation will not be ignored.