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CFD study of non-premixed swirling burners: Effect of turbulence models
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Energy and Furnace Technology. KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.ORCID iD: 0000-0002-5976-2697
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.ORCID iD: 0000-0003-4384-7984
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2020 (English)In: Chinese Journal of Chemical Engineering, ISSN 1004-9541, E-ISSN 2210-321X, Vol. 28, no 4, p. 1029-1038Article in journal (Refereed) Published
Abstract [en]

This research investigates a numerical simulation of swirling turbulent non-premixed combustion. The effects on the combustion characteristics are examined with three turbulence models: namely as the Reynolds stress model, spectral turbulence analysis and Re-Normalization Group. In addition, the P-1 and discrete ordinate (DO) models are used to simulate the radiative heat transfer in this model. The governing equations associated with the required boundary conditions are solved using the numerical model. The accuracy of this model is validated with the published experimental data and the comparison elucidates that there is a reasonable agreement between the obtained values from this model and the corresponding experimental quantities. Among different models proposed in this research, the Reynolds stress model with the Probability Density Function (PDF) approach is more accurate (nearly up to 50%) than other turbulent models for a swirling flow field. Regarding the effect of radiative heat transfer model, it is observed that the discrete ordinate model is more precise than the P-1 model in anticipating the experimental behavior. This model is able to simulate the subcritical nature of the isothermal flow as well as the size and shape of the internal recirculation induced by the swirl due to combustion. 

Place, publisher, year, edition, pages
Elsevier BV , 2020. Vol. 28, no 4, p. 1029-1038
Keywords [en]
Computational Fluid Dynamics (CFD), Large eddy simulations, Modeling validation, Non-premixed flames, Radiative heat transfer model, Turbulent combustion
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-274035DOI: 10.1016/j.cjche.2020.02.016ISI: 000555483300009Scopus ID: 2-s2.0-85082007381OAI: oai:DiVA.org:kth-274035DiVA, id: diva2:1449522
Note

QC 20200630

Available from: 2020-06-30 Created: 2020-06-30 Last updated: 2022-06-26Bibliographically approved

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Saffari Pour, MohsenErsson, MikaelJönsson, Pär

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Energy and Furnace TechnologyApplied Process MetallurgyMaterials Processing
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