A SPECTRAL LINE-BASED WEIGHTED-SUM-OF-GRAY-GASES MODEL FOR ARBITRARY RTE SOLVERS

被引:296
作者
DENISON, MK
WEBB, BW
机构
[1] Department of Mechanical Engineering, Brigham Young University, Provo, UT
来源
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME | 1993年 / 115卷 / 04期
关键词
COMBUSTION; HIGH TEMPERATURE PHENOMENA; RADIATION;
D O I
10.1115/1.2911354
中图分类号
O414.1 [热力学];
学科分类号
摘要
This paper presents an approach for generating weighted-sum-of-gray gases (WSGG) models directly from the line-by-line spectra of H2O. Emphasis is placed on obtaining detailed spectral division among the gray gases. Thus, for a given model spectrum, the gray gas weights are determined as blackbody fractional functions for specific subline spectral regions at all temperatures. The model allows the absorption coefficient to be the basic radiative property rather than a transmissivity or band absorptance, etc., and can be used with any arbitrary solution method for the Radiative Transfer Equation (RTE). A single absorption cross section spectrum is assumed over the entire spatial domain in order to fix the subline spectral regions associated with a single spectral calculation. The error associated with this assumption is evaluated by comparison with line-by-line benchmarks for problems of nonisothermal and nonhomogeneous media.
引用
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页码:1004 / 1012
页数:9
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