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Radiative Transfer II. Proceedings of the Second International Symposium on Radiation Transfer
July, 1997 , Kusadasi, Turkey

DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhenCHTRadTransfProc


ISBN Print: 978-1-56700-116-7

ISSN Online: 2642-5629

ISSN Flash Drive: 2642-5661

AN IMPROVED SPECTRAL WSGGM OF WATER VAPOR USING A NARROW BAND MODEL

page 15
DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhenCHTRadTransfProc.300
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Краткое описание

A WSGGM-based low resolution spectral modeling of radiative properties of water vapor using a narrow band model has been presented. For a given narrow band, models of gray gas absorption coefficients vs. temperature relation have been reviewed and an improved model is suggested. The modeled gray gas absorption coefficients become the basic radiative property which can be used for any solution methods for Radiative Transfer Equation (RTE). Comparisons between the modeled emissivity and the 'true' emissivity generated from a high temperature statistical narrow band parameters are made for a few typical bands. Application of the model to nonuniform gas layer is also made. Low resolution spectral intensities at the boundary are obtained for uniform, parabolic and boundary layer type temperature profiles using the obtained WSGGM's with 15 gray gases. The results are compared with the narrow band spectral intensities as obtained by a narrow band model-based code with the Curtis-Godson approximation. Good agreement is found between them. Local heat source strength and total wall heat flux are also compared for the reference cases, which again produced acceptable agreement.

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