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COBEM 2021
26th International Congress of Mechanical Engineering
GENERATION OF C-DISTRIBUTIONS FOR THE BANDED-SLW MODEL
Submission Author:
Guilherme Crivelli Fraga , SP
Co-Authors:
Guilherme Crivelli Fraga, Felipe Ramos Coelho, Francis França
Presenter: Guilherme Crivelli Fraga
doi://10.26678/ABCM.COBEM2021.COB2021-0291
Abstract
Narrow-band C-distributions are generated for water vapor and carbon dioxide using absorption spectra extracted from the high-resolution spectroscopic database HITEMP2010, for conditions typically found in atmospheric combustion processes. These C-distributions are similar to the k-distributions used in some narrow-band models, but they are set up in a more convenient way for utilization with the spectral line-based weighted-sum-of-gray-gases (SLW) and banded-SLW models. Narrow-band mean absorption coefficients and emittances calculated from the C-distributions show remarkable agreement with data computed directly from the high-resolution spectra (errors of less than 0.1%), and both full-spectrum and partial-spectrum absorption line blackbody distribution functions (ALBDFs) can be assembled from the narrow-band distributions with a high degree of accuracy. Finally, a sample of cases consisting of non-coupled, one-dimensional radiative heat transfer calculations are tested to illustrate how the C-distributions obtained here can be applied to the SLW and banded-SLW models.
Keywords
thermal radiation, radiative properties, spectral modeling, Narrow-band k-distributions, SLW Model
