利用HITEMP2010 的Malkmus 窄谱带模型参数库构建研究

为精确求解发动机高温燃气红外辐射特性,需要调用描述气体辐射传输特性的谱带参数如光谱吸收系数或光谱透过率,而谱带参数随气体温度、波数变化而变化。首先采用逐线计算方法,比较分析了气体分子谱线参数HITRAN2008和其高温扩展版本HITEMP2010的适用范围;其次,针对逐线计算复杂且效率低的问题,提出了一种基于Malkmus统计窄谱带模型的谱带参数库构建方法并开发了计算程序,在此基础上,分别计算了CO2、H2O的均匀路径单组分光谱特性、非均匀路径单组分光谱特性,还计算了CO2、H2O、N2组合的非均匀路径多组分光谱特性。研究表明:计算结果和试验数据吻合较好,说明所提出的基于HITEMP2010的Malkmus统计窄谱带模型适用于高温燃气辐射传输特性计算。

Construction of Malkmus statistical narrow spectral band model parameters database based on HITEMP2010

In order to make high accuracy predictions of high temperature combustion gases infrared radiation characteristics, the spectral band model parameters such as spectral absorption coefficient or spectral transmittance which changed with gases temperature and wave number must be invoked. A new construction method of spectral band model parameters database based on Malkmus statistical narrow band model was proposed. The HITRAN2008 and HITEMP2010 molecular spectroscopic databases were employed to meet the requirement of normal temperature and high temperature calculations in the mode, and a calculation program for the Malkmus statistical narrow band model with average transmittance had been developed. Then the program was employed to calculate the single component spectral radiation characteristics of CO2 and H2O in both homogeneous path and inhomogeneous path respectively, and the multi-component spectral radiation characteristics of CO2, H2O and N2 in inhomogeneous path. The result shows good agreement with the experimental data from the literature, and the proposed Malkmus statistical narrow band model is suitable for the high temperature gas radiation transfer characteristic calculation.