参考传热学相关理论,估算燃烧室的传热损耗分数及相应的平衡温度,确定了主喷管的入口参数设置。在此基础上,对环形HYLTE喷管的耦合段及光腔区流场进行3维的数值模拟,给出了F原子质量分数、静温、静压的空间分布,得到了光腔区各支谱线的小信号增益系数变化曲线。将计算结果与实验结果进行比对,光谱测量结果及移动光轴实验证实了计算模型的合理性。 Reference heat transfer theory, estimate the heat transfer loss of the combustion chamber and the corresponding equilibrium temperature, to determine the main nozzle inlet parameter settings. On this basis, the three-dimensional numerical simulation of the flow field in the coupling cavity and the cavity of the annular HYLTE nozzle was carried out. The spatial distributions of F atom mass fraction, static temperature and static pressure were given. Small signal gain coefficient curve. The calculated results are compared with the experimental results. The results of spectral measurement and the experiment of moving optical axis confirm the rationality of the calculation model.