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**Harvard**

Johansson, R., Andersson, K., Leckner, B. och Johnsson, F. (2011) *Account for variations in the H<sub>2</sub>O to CO<sub>2</sub> molar ratio when modelling gaseous radiatve heat transfer with the weighted-sum-of-grey-gases model*.

** BibTeX **

@article{

Johansson2011,

author={Johansson, Robert and Andersson, Klas and Leckner, Bo and Johnsson, Filip},

title={Account for variations in the H<sub>2</sub>O to CO<sub>2</sub> molar ratio when modelling gaseous radiatve heat transfer with the weighted-sum-of-grey-gases model},

journal={Combustion and Flame},

issn={0010-2180},

volume={158},

issue={5},

pages={893-901},

abstract={This work focuses on models suitable for taking into account the spectral properties of combustion gases
in computationally demanding applications, such as computational fluid dynamics. One such model,
which is often applied in combustion modelling, is the weighted-sum-of-grey-gases (WSGG) model.
The standard formulation of this model uses parameters fitted to a wide range of temperatures, but only
for specific ratios of H2O to CO2. Then, the model is limited to gases from fuels with a given composition
of hydrogen and carbon, unless several sets of fitted parameters are used. Here, the WSGG model is modified
to account for various ratios of H2O to CO2 concentrations. The range of molar ratios covers both oxyfuel
combustion of coal, with dry- or wet flue gas recycling, as well as combustion of natural gas. The nongrey
formulation of the modified WSGG model is tested by comparing predictions of the radiative source
term and wall fluxes in a gaseous domain between two infinite plates with predictions by a statistical
narrow-band model. Two grey approximations are also included in the comparison, since such models
are frequently used for calculation of gas radiation in comprehensive combustion computations. It is
shown that the modified WSGG model significantly improves the estimation of the radiative source term
compared to the grey models, while the accuracy of wall fluxes is similar to that of the grey models or
better.},

year={2011},

keywords={Gas radiation, Combustion, Modelling, Spectral properties },

}

** RefWorks **

RT Journal Article

SR Electronic

ID 138740

A1 Johansson, Robert

A1 Andersson, Klas

A1 Leckner, Bo

A1 Johnsson, Filip

T1 Account for variations in the H<sub>2</sub>O to CO<sub>2</sub> molar ratio when modelling gaseous radiatve heat transfer with the weighted-sum-of-grey-gases model

YR 2011

JF Combustion and Flame

SN 0010-2180

VO 158

IS 5

SP 893

OP 901

AB This work focuses on models suitable for taking into account the spectral properties of combustion gases
in computationally demanding applications, such as computational fluid dynamics. One such model,
which is often applied in combustion modelling, is the weighted-sum-of-grey-gases (WSGG) model.
The standard formulation of this model uses parameters fitted to a wide range of temperatures, but only
for specific ratios of H2O to CO2. Then, the model is limited to gases from fuels with a given composition
of hydrogen and carbon, unless several sets of fitted parameters are used. Here, the WSGG model is modified
to account for various ratios of H2O to CO2 concentrations. The range of molar ratios covers both oxyfuel
combustion of coal, with dry- or wet flue gas recycling, as well as combustion of natural gas. The nongrey
formulation of the modified WSGG model is tested by comparing predictions of the radiative source
term and wall fluxes in a gaseous domain between two infinite plates with predictions by a statistical
narrow-band model. Two grey approximations are also included in the comparison, since such models
are frequently used for calculation of gas radiation in comprehensive combustion computations. It is
shown that the modified WSGG model significantly improves the estimation of the radiative source term
compared to the grey models, while the accuracy of wall fluxes is similar to that of the grey models or
better.

LA eng

DO 10.1016/j.combustflame.2011.02.001

LK http://dx.doi.org/10.1016/j.combustflame.2011.02.001

OL 30