气体高温辐射特性窄谱带模型参数库构建

不同推进剂火箭发动机尾焰中主要辐射气体组分不同，采用谱带模型法精确快速求解不同推进剂火箭发动机尾焰红外辐射特性，需要构建描述气体辐射特性的谱带参数数据库。提出了一种谱带参数库构建方法并开发了计算程序，以HITEMP2010数据库为基础构建了波数间隔5 cm-1、温度间隔100 K的CO2和H2O谱带模型参数库，通过与实验测量对比吸收系数分布特性、与逐线计算法对比透过率分布特性验证了所提出模型和开发程序的准确性；在此基础上，分别以HITEMP2010和HITRAN2012数据库为基础构建了辐射气体CO、OH、NO和NO2的谱带模型参数数据库，并结合逐线计算法对比分析了不同温度下、不同光学行程下透过率分布特性。

Establishment of narrow spectral band model parameters database for gas high temperature radiation characteristics

The main radiation gas components are completely different in different propellant rocket engine exhaust plume, the gas spectral parameter database need to be built to quickly and accurately solve the infrared radiation characteristics of different propellant rocket exhaust plume using the spectral band model. A method of constructing the gas spectral parameter database and the program were proposed, based on the method and HITEMP2010, CO2 and H2O spectral parameter databases were establised with the wave number interval 5 cm-1 and the temperature interval 100 K; the model and the program were verified to be correct through comparing the calculated absorption coefficient distribution with the experimental measurements and comparing the calculated transmittance distribution with that calculated using the line-by-line method. Based on that, CO, OH, NO and NO2 spectral parameter databases were established based on HITEMP2010 and HITRAN 2012, and the transmittance distributions on different temperatures and different optical strokes were comparatively analyzed combined with the line-by-line method.