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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
ANALYSIS OF THERMAL RADIATION MODELS IN THE PRESENCE OF DIFFERENT LEVELS OF TURBULENT FLUCTUATIONS
Submission Author:
Bruno de Luca Zimmer Gomes , RS
Co-Authors:
Bruno de Luca Zimmer Gomes, Guilherme Crivelli Fraga, Francis França
Presenter: Bruno de Luca Zimmer Gomes
doi://10.26678/ABCM.ENCIT2020.CIT20-0289
Abstract
In turbulent reactive fluxes, it is important to include the effects of the Turbulence-Radiation interaction (TRI). If not included, it can lead to large errors in the predicted radiant heat flow and in the radiation fraction of the flame. The objective of this paper is to test the accuracy of the different WSGG models under the effects of TRI when compared to the Line-by-line integration (LBL) method. The WSGG models were tested for three different levels of turbulence intensity (TI): 0 %, 40 % and 60 %. The WSGG models that were analyzed showed an average of 5 % in the differences between the models and the LBL benchmark solution for both the source term and the radiative heat flux. There is slight improvement in the accuracy of the WSGG models with the increase in the turbulence intensity. This study brings as a contribution the investigation of the turbulence effects in reactive flows. The results are discussed based on the accuracy of the analyzed WSGG models.
Keywords
Turbulence-radiation interaction, thermal radiation, temperature fluctuations, Spectral models, WSGG model
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