Abstract: Based on the quantitative analysis of exhaust plume spectral experimental data,a radiative transport theory for high temperature gas was developed. The result of simulation for 1Cr18Ni9Ti in the plume was represented. The results indicate that while the length is equal, optically thin model is fit for lower concentration and optically thick model for upper situations.

Key words: Liquid propellant rocket engine;Plume;Spectral measurement;Optical thickress;Atomic spec-troscopy;Numerical simulation

摘要： 为对液体火箭发动机羽流光谱实验数据进行定量分析 ,通过建立高温气体下辐射传递模型 ,对1 Cr1 8Ni9Ti的理论光谱进行了仿真计算。结果表明 ,在路径一定的情况下 ,羽流中原子浓度较低时 ,可采用光学薄模型 ,原子浓度较高时 ,可采用光学厚模型

关键词: 液体推进剂火箭发动机;羽流;光谱测量;光学厚度;原子光谱学;数值仿真