WSGG correlations based on HITEMP2010 for computation of thermal radiation in non-isothermal, non-homogeneous H2O/CO2 mixtures

Dorigon, Leonardo J.; Duciak, Gustavo; Brittes, Rogério; Cassol, Fabiano; Galarça, Marcelo Moraes; França, Francis

doi:10.1016/j.ijheatmasstransfer.2013.05.010

Cited by 147 publications

(84 citation statements)

References 21 publications

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“…The radiation field was computed with the WSGG model using recently obtained correlations (Dorigon et al, 2013) based on the up-todate HITEMP2010 and considering TRI effects (Snegirev, 2004). A two-step global reaction mechanism was used and turbulence modeling was considered via standard k-ε model.…”

Section: Discussionmentioning

confidence: 99%

“…Such WSGG correlations were fitted from HITEMP 2010 (Rothman et al, 2010), which is the most recent molecular spectroscopic database for high temperatures. In the same study, Dorigon et al (2013) compared results obtained with the new coefficients against line-by-line (LBL) benchmark calculations for one-dimensional non-isothermal and non-homogeneous problems, finding consistently satisfactory agreement between the LBL and WSGG solutions, with maximum and average errors of about 5% and 2% for different test cases. Centeno et al (2013) tested the coefficients presented in Dorigon et al (2013) against old ones presented in Smith et al (1982) for an axisymmetric cylindrical combustion chamber, and found that the new coefficients provided better agreement with experimental data.…”

Section: The Weighted-sum-of-gray-gases (Wsgg) Modelmentioning

confidence: 94%

“…The proposed work is stated as: considering a steady turbulent non-premixed methane-air flame in a cylindrical chamber, compute the temperature, species concentrations and velocity fields, and verify the influence of radiation on turbulence main parameters, taking into account the WSGG model based on HITEMP 2010 data (Dorigon et al, 2013) and TRI effects (Snegirev, 2004).…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…For H 2 O/ CO 2 mixtures, these coefficients are generally established for particular ratios of the partial pressure, p H2O /p CO2 , which could limit the application of the method. In the present study, the weighted factors polynomial coefficients and absorption coefficients were taken from Dorigon et al (2013) for p H2O /p CO2 = 2. Such WSGG correlations were fitted from HITEMP 2010 (Rothman et al, 2010), which is the most recent molecular spectroscopic database for high temperatures.…”

Section: The Weighted-sum-of-gray-gases (Wsgg) Modelmentioning

confidence: 99%

“…This study presents a numerical RANS (Reynolds Average Navier-Stokes) simulation of a turbulent non-premixed methane-air flame in a cylindrical combustion chamber taking into account radiation effect of non-gray gases by means WSGG correlations (Dorigon et al, 2013) generated from HITEMP 2010 database (Rothman et al, 2010) and including TRI (Snegirev, 2004), with the objective of evaluating the influence of radiation on turbulence, since such influence has been received much less attention in the literature than the influence of turbulence on radiation.…”

Section: Introductionmentioning

confidence: 99%

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Um estudo numérico da influência da radiação sobre a turbulência em uma chama turbulenta 2D axissimétrica

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et al. 2016

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Abstract. This paper presents a study of the influence of thermal radiation on turbulence in the simulation of a turbulent, non-premixed methane-air flame. In such a problem, two aspects need to be considered for a precise evaluation of the thermal radiation: the turbulence-radiation interactions (TRI), and the radiative properties of the participating species, which are treated here with the weighted-sum-of-gray-gases (WSGG) model based on recently obtained correlations from HI-TEMP2010 database. The chemical reactions rates were considered as the minimum values between the Arrhenius and Eddy Break-Up rates. A twostep global reaction mechanism was employed, while the turbulence modeling was considered via Resumo. Este artigo apresenta um estudo da influência da radiação térmica sobre a turbulência através da simulação de uma chama turbulenta, não pré-misturada, de metano-ar. Neste problema dois aspectos precisam ser considerados para uma avaliação precisa da radiação térmica: interações turbulência-radiação (TRI) e as propriedades radiativas das espécies participantes, as quais são tratadas aqui com o modelo da soma ponderada de gases cinza (WSGG) baseado em correlações recentemente obtidas a partir do banco de dados espectrais HITEMP2010. As taxas das reações químicas foram consideradas como os menores valores entre as taxas de Arrhenius e de Eddy Break-Up. Um mecanismo de reação global de duas etapas foi empregado, enEste é um artigo de acesso aberto, licenciado por Creative Commons Atribuição 4.0 International (CC-BY 4.0), sendo permitidas reprodução, adaptação e distribuição desde que o autor e a fonte originais sejam creditados. 56

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Section: Discussionmentioning

confidence: 99%

Section: The Weighted-sum-of-gray-gases (Wsgg) Modelmentioning

confidence: 94%

Section: Mathematical Formulationmentioning

confidence: 99%

Section: The Weighted-sum-of-gray-gases (Wsgg) Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Um estudo numérico da influência da radiação sobre a turbulência em uma chama turbulenta 2D axissimétrica

Centeno

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et al. 2016

ete

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New weighted-sum-of-gray-gases model for typical pressurized oxy-fuel conditions

et al. 2017

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Summary Pressurized oxy‐fuel combustion technology has received considerable attention due to its ability to improve the overall system efficiency and to control CO2 emissions. The characteristics of radiation heat transfer are significant for pressurized oxy‐fuel gas mixture and different from those under atmospheric conditions. Therefore, to calculate the radiation characteristics of pressurized oxy‐fuel gas mixture quickly and accurately, new weighted‐sum‐of‐gray‐gases (WSGG) model for pressurized oxy‐fuel conditions was first presented in this paper, which was applied in 3 typical high pressure conditions: 5, 10, and 15 bar. The new WSGG model correlations were suitable for pressurized conditions with a molar ratio range of 0.125‐2, temperature range of 400‐2500 K, and path length range of 0.1‐20 m. Calculations for a variety of typical pressurized oxy‐fuel combustion cases showed that the new WSGG model can accurately predict the radiation characteristics and heat transfer characteristics of the gas mixtures compared with the SNB model benchmark. In addition, the application of the previous atmospheric WSGG models yielded non‐ideal results under pressurized conditions. Consequently, the new model can provide efficient and accurate radiation heat transfer results for pressurized oxy‐fuel conditions and can be used to design pressurized oxy‐fuel combustion furnaces or boilers.

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Nongray inverse boundary design problems in enclosures at radiative equilibrium

Amiri

Lari

2019

Heat Trans. Asian Res.

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In this paper, an inverse analysis is used to find an appropriate heat flux distribution over the heater surface of radiant enclosures, filled with nongray media at radiative equilibrium from the knowledge of desired (prespecified) temperature and heat flux distributions over the given design surface. Regular and irregular 2D enclosures filled with nongray combustive gas products are considered. Radiation is considered the dominant mode of heat transfer and the medium temperature is obtained from the energy equation. To evaluate the nongray behavior of the participating gases properly, the spectral‐line weighted‐sum‐of‐gray‐gases (SLW) model with updated correlations is used. The dependence of absorption coefficients and the weights of the SLW model on the temperature of the medium makes the inverse problem nonlinear and difficult to handle. Here, the inverse problem is formulated as an optimization problem and the Levenberg‐Marquardt method has been used to solve it. The finite volume method is exploited for the discretization of the energy equation and the spatial discretization of the radiative transfer equation (RTE). The discrete ordinates method (TN quadrature) is used for the angular discretization of RTE. Five test cases, including homogeneous and inhomogeneous media, are investigated to prove the ability of the present methodology for achieving the desired conditions.

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WSGG correlations based on HITEMP2010 for computation of thermal radiation in non-isothermal, non-homogeneous H2O/CO2 mixtures

Cited by 147 publications

References 21 publications

Um estudo numérico da influência da radiação sobre a turbulência em uma chama turbulenta 2D axissimétrica

Um estudo numérico da influência da radiação sobre a turbulência em uma chama turbulenta 2D axissimétrica

New weighted-sum-of-gray-gases model for typical pressurized oxy-fuel conditions

Nongray inverse boundary design problems in enclosures at radiative equilibrium

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