ASSESSMENT OF A MODEL FOR SUBGRID-SCALE TURBULENCE-RADIATION INTERACTION APPLIED TO THE SCALED SANDIA FLAME D

被引：0

作者：

Fraga, Guilherme C. ^{[1
]}

Miranda, Flavia C. ^{[2
]}

Franca, Francis H. R. ^{[1
]}

Coelho, Pedro J. ^{[3
]}

Janicka, Johannes ^{[2
]}

机构：

[1] Univ Fed Rio Grande do Sul, BR-90040060 Porto Alegre, RS, Brazil

[2] Tech Univ Darmstadt, Inst Energy & Power Plant Technol, D-64287 Darmstadt, Germany

[3] Univ Lisbon, Inst Super Tecn, IDMEC, P-1049001 Lisbon, Portugal

来源：

PROCEEDINGS OF THE 9TH INTERNATIONAL SYMPOSIUM ON RADIATIVE TRANSFER, RAD 2019 | 2019年

关键词：

LARGE-EDDY SIMULATIONS; NUMERICAL-SIMULATION; THERMAL-RADIATION; SOOT;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A preliminary assessment of a simple model to account for subgrid-scale turbulenceradiation interaction (SGS-TRI) in a methane-air jet diffusion flame is presented. Results of this model are compared to those obtained by fully neglecting SGS-TRI and to a solution fully considering the phenomenon, this last one obtained via an Eulerian Monte Carlo stochastic field (ESF) method. The studied model did not offer a significant improvement in the predicted radiative emission, though this is manly due to a heavy underestimation of the subgrid-scale temperature variance, which is determined in the model by assuming local equilibrium between dissipation and production of this quantity. If the SGS temperature variance calculated with the ESF method is used instead, the performance of the SGS-TRI model improves considerably. Even so, contributions of SGS fluctuations of the absorption coefficient, which are currently altogether neglected, should be included for a better prediction of the filtered emission.

引用

页码：9 / 16

页数：8

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