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Coupled Systems Mechanics Volume 1, Number 3, September 2012 , pages 285-295 DOI: https://doi.org/10.12989/csm.2012.1.3.285 |
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The comparison of radial and axial flow porous burners from viewpoint of output radiative heat transfer and emissions |
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N. Ghiasi Tabari, M.R. Astaraki and A.H. Arabi
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| Abstract | ||
| In this paper, two types of porous burners with radial and axial flow have been modeled numerically and compared. For this purpose, governing equations were solved one-dimensionally for methane-air premix gas. The mechanism used in simulating combustion phenomenon was 15 stage reduced mechanism based on GRI3.0. In order to compare the two burners, the inlet flow rate and fuel-air ratio have been assumed equal for the two burners. The results of the study indicated that reduction in speed and increase in cross-section area in the direction of flow have a considerable influence on the behavior of radial burner in comparison to axial burner. Regarding temperature distribution inside the burner, it was observed that the two above mentioned factors can be influential in temperature of flame propagation region. Also, regarding distribution of CO and NO emission, the results indicate that the porous radial burner has lower emissions in comparison to the axial once. The output radiative heat transfer efficiency of the two burners was also compared and in this case also even the radial porous burner was found to be preferable. | ||
| Key Words | ||
| radial porous burner; axial porous burner; emissions; speed reduction | ||
| Address | ||
| N. Ghiasi Tabari, M.R. Astaraki and A.H. Arabi : Islamic Azad University-Dashtestan branch, Dashtestan, Bushehr, Iran | ||
