CFD modeling using PDF approach for investigating the flame length in rotary kilns
| Autor: | Abdullah S. Bin-Mahfouz, A. Fouda, Eckehard Specht, H.F. Elattar |
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| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Kiln business.industry Turbulence Rotational symmetry Probability density function 02 engineering and technology Mechanics Computational fluid dynamics 021001 nanoscience & nanotechnology Condensed Matter Physics Methane law.invention chemistry.chemical_compound 020401 chemical engineering chemistry Fuel gas law Environmental science 0204 chemical engineering 0210 nano-technology business Rotary kiln |
| Zdroj: | Heat and Mass Transfer. 52:2635-2648 |
| ISSN: | 1432-1181 0947-7411 |
| DOI: | 10.1007/s00231-016-1768-7 |
| Popis: | Numerical simulations using computational fluid dynamics (CFD) are performed to investigate the flame length characteristics in rotary kilns using probability density function (PDF) approach. A commercial CFD package (ANSYS-Fluent) is employed for this objective. A 2-D axisymmetric model is applied to study the effect of both operating and geometric parameters of rotary kiln on the characteristics of the flame length. Three types of gaseous fuel are used in the present work; methane (CH4), carbon monoxide (CO) and biogas (50 % CH4 + 50 % CO2). Preliminary comparison study of 2-D modeling outputs of free jet flames with available experimental data is carried out to choose and validate the proper turbulence model for the present numerical simulations. The results showed that the excess air number, diameter of kiln air entrance, radiation modeling consideration and fuel type have remarkable effects on the flame length characteristics. Numerical correlations for the rotary kiln flame length are presented in terms of the studied kiln operating and geometric parameters within acceptable error. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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