An Exploration of Advanced SLW Modeling Approaches in Comprehensive Combustion Predictions

Badger, Jacob; Webb, Brent W.; Solovjov, Vladimir P.

doi:10.1080/00102202.2019.1678907

Cited by 13 publications

(5 citation statements)

References 20 publications

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“…Further, the RC-SLW model consists of the fewest steps in its construction. However, it was discovered that despite the simplicity, robustness, and accuracy of the RC-SLW model, the CPU time associated with its application is noticeably higher than that of the RA-SLW and LC-SLW methods [Badger et al, 2019]. Construction of the SLW models is based on application of the "The Choice of Optimal Absorption Coefficient...," by Webb et al 2 Absorption-Line Blackbody Distribution function (ALBDF), which is calculated in advance from the highresolution gas absorption spectrum, and stored in tabulated form [Pearson et al, 2014].…”

Section: Introduction To Slw Correlated Methodsmentioning

confidence: 99%

The choice of optimal absorption coefficient in the Rank-Correlated SLW model for prediction of radiative transfer in high temperature gases

Webb

Solovjov

André

2022

Journal of Quantitative Spectroscopy and Radiative Transfer

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Section: Introduction To Slw Correlated Methodsmentioning

confidence: 99%

The choice of optimal absorption coefficient in the Rank-Correlated SLW model for prediction of radiative transfer in high temperature gases

Webb

Solovjov

André

2022

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…4,5,8 The SLWSGG model is applied in its very fine integration form. However, it should be noted that Webb et al 36 and Badger et al 24 proposed the most recent implementation of the model named Rank Correlated SLW Model which can produce accurate results with as few as three gray gases requiring no optimization. The detailed theoretical background of such models can be found in the book of Modest.…”

Section: Numerical Modeling and Simulationmentioning

confidence: 99%

“…Many difficulties arise when dealing with radiation modeling: highly spectral dependence of gaseous radiative properties, large CPU cost going with the solving of the radiative transfer equation (RTE) and consideration of finite rate chemistry for highly diluted combustion can be cited amongst others. 24,25 In a recent review paper, Liu et al 25 outlines the challenges associated with radiative transfer predictions in combustion applications, and the different approaches that may be used with tradeoffs. The SLWSGG model has the advantages and the capability to extend to modeling large-scale industrial furnaces featuring multi-injection of low-carbon fuels and/or oxidizers in different zones for decarbonization.…”

Section: Introductionmentioning

confidence: 99%

Flameless combustion of low calorific value gases, experiments, and simulations with advanced radiative heat transfer modeling

Nguyen

Domingo

et al. 2022

Physics of Fluids

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Thermal radiation is the dominant mode of heat transfer in many combustion systems, and in typical flameless furnaces, it can represent up to 80% of the total heat transfer. Accurate modeling of radiative heat transfer is, thus, crucial in the design of these large-scale combustion systems. Thermal radiation impacts the thermochemistry, thereby the energy efficiency and the temperature sensitive species prediction, such as NOx and soot. The requirement to accurately describe the spectral dependence of gaseous radiative properties of combustion products interacts with the modeling of finite rate chemistry effects and conjugates heat transfer and turbulence. Additionally, because of the multiple injection of fuels and/or oxidizers of various compositions, case-specific radiative properties' expressions are required. Along these lines, a comprehensive modeling to couple radiation and combustion in reacting flows is attempted and applied to the simulation of flameless combustion. Radiation is modeled using the spectral line-based weighted-sum-of-gray-gases approach to calculate gaseous radiative properties of combustion products using the correlation of the line-by-line spectra of H2O and CO2. The emissivity weights and absorption coefficients were optimized for a range of optical thicknesses and temperatures encountered in the considered furnace. Efforts were also made on the development of a reliable and detailed experimental dataset for validation. Measurements are performed in a low calorific value syngas furnace operating under flameless combustion. This test rig features a thermal charge which can extract about 60% of combustion heat release via 80% of radiative heat transfer, making it of special interest for modeling validation. The comparison between the simulation and the experiment demonstrated a fair prediction of heat transfer, energy balance, temperature, and chemical species fields.

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“…However, it should be pointed out that the computational efficiency of the FSCK II scheme was considerably improved by the development of a new look-up table [31] and this new storage has not been considered in the present study. It should be further noted that the computation of the RC-FSK model may also be accelerated using several approaches, as suggested in [32,33].…”

Section: Comparison Of the Different Modelsmentioning

confidence: 99%

Assessment of engineering gas radiative property models in high pressure turbulent jet diffusion flames

Consalvi

André

Coelho

et al. 2020

Journal of Quantitative Spectroscopy and Radiative Transfer

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This article aims to determine the most relevant engineering global method for gas radiative property modeling to be applied in the simulations of combustion problems. Two versions of the full-spectrum correlated k (FSCK) model, the Rank-Correlated full-spectrum k-distribution/ Spectral-Line-Weighted-sum-of-gray-gases (RC-FSK/RC-SLW) and a new version of the Weighted-Sum-of-Grey-Gases (WSGG) model are compared with the Narrow-Band CK (NBCK) model in four turbulent axisymmetric jet diffusion flames fueled either by hydrogen or methane at atmospheric and higher pressures. These comparisons are performed in decoupled radiative heat transfer calculations with the thermal fields being prescribed. The databases and coefficients associated to these different models are determined from a unique Line-By-Line database in order to allow a relevant comparison. Model results suggest that the SLW/FSCK methods coupled to the so-called improved scheme proposed by Cai and Modest or the Rank-Correlated SLW/FSK model, along with k-g distributions generated from accurate high-resolution high-temperature databases are the most mature gas radiative property models to be implemented in CFD codes dealing with combustion problems involving gassoot mixtures.

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An Exploration of Advanced SLW Modeling Approaches in Comprehensive Combustion Predictions

Cited by 13 publications

References 20 publications

The choice of optimal absorption coefficient in the Rank-Correlated SLW model for prediction of radiative transfer in high temperature gases

The choice of optimal absorption coefficient in the Rank-Correlated SLW model for prediction of radiative transfer in high temperature gases

Flameless combustion of low calorific value gases, experiments, and simulations with advanced radiative heat transfer modeling

Assessment of engineering gas radiative property models in high pressure turbulent jet diffusion flames

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