气体光谱数据库对气体辐射特性的影响

Effect of gas spectroscopic database on gas radiative characteristics

中文关键词: 光谱数据库  普朗克平均吸收系数  逐线法  统计窄谱带模型  统计窄谱带关联K模型

英文关键词: spectroscopic database  Planck mean absorption coefficients  line-by-line  the statistical narrow-band model  the statistical narrow-band correlated-K model

中文摘要:

      利用最新光谱数据库提出了基于数据库的普朗克平均吸收系数计算方法和逐线法,并针对一维平行平板间等温辐射换热传热问题探讨了逐线法(line-by-line, LBL)、统计窄谱带模型(the statistical narrow-band model, SNB)和统计窄谱带关联K模型(the statistical narrow-band correlated-K model, SNBCK)计算原理、计算精度和三模型间的偏离变化。结果表明,三种模型的结果吻合较好,几个数据库都比较准确。对于逐线法,表明可采用HITRAN2012光谱数据库(High Resolution TRANsmission spectroscopic database)替代HITEMP2010数据库(HIgh-TEMPerature spectroscopic absorption parameters spectroscopic database)来提高计算效率。

英文摘要:

      Based on the updated spectroscopic database, the Planck mean absorption coefficients of CO2 and H2O in the temperature range of 300 to 2500 K and the line-by-line (LBL) method were proposed. Thermal radiation transfer in one-dimensional enclosure between two parallel plates filled with real gases, namely CO2, H2O, or their mixtures, was calculated using the LBL approach, the statistical narrow-band (SNB) model and the statistical narrow-band correlated-K (SNBCK) model with their spectroscopic databases. The LBL results were compared with the classical results and those from the statistical narrow-band model. For isothermal and homogeneous media, three databases are very accurate. This work indicates that the HITRAN2012 spectroscopic database (High Resolution TRANsmission spectroscopic database) can replace the HITEMP2010 database (High TEMPerature spectroscopic absorption parameters spectroscopic database) to improve computational efficiency.