Calculations of Narrow-Band Transmissivity and the Planck Mean Absorption Coefficients of CO2 Based on High-Resolution Transmission Molecular Absorption, High-Temperature Molecular Spectroscopic and CO2 Databank Databases
Abstract
The radiation emission of CO2 plays an important role in the radiative heat transfer of high-temperature furnace and gas turbine, it is essential to estimate the radiative heat transfer of CO2 accurately with an appropriate spectral database. Based on the HITRAN 2008, HITRAN 2016, HITEMP 2010 and CDSD-4000 spectral databases, the statistical narrow band (SNB) model was employed to study the radiative heat transfer of CO2 in a one-dimensional planar enclosure. The effects of four different spectral databases on accuracy of radiation calculation results of CO2 were discussed. The results calculated with CDSD-4000 database were in good agreement with the benchmark, and the maximum average relative error was 6%. Moreover, the absolute values of the radiative heat source calculated with CDSD-4000 in all cases were larger than the benchmark, because there were more spectral lines involved in CDSD-4000 database. However, due to the lack of hot lines in HITRAN databases, significant deviation could be observed, especially for the high temperature cases with 39% maximum average relative error. Finally, the Planck mean absorption coefficients of CO2 were calculated by the LBL method with CDSD-4000 database.