Abstract
A two-dimensional model with the detailed chemistry and variable transport properties has been applied to numerically investigate the combustion processes and flame dynamics in the bilayer porous burner. To account for the velocity transition and diffusion influenced by solid matrix, porosity terms are included in the governing equations. Heat transfer coefficient is calculated by Nusselt number to reflect the effect of gas velocity, pore diameter, and material properties. The detailed chemistry is based on GRI 2.11. Numerical results indicate that the present approach is capable of the essential features of the premixed combustion in the porous media in terms of the precise flame structure, pollutant formation, and stabilization characteristics. In this bilayer porous burner, the heat transferred from the downstream flame zone is conducted to the upstream flame region through the solid matrix. This heat transfer process through the solid matrix substantially influences the flame structure and stabilization characteristics in the porous media. The predicted results are compared with experimental data in terms of temperature for gaseous mixture and solid matrix, CO and NO emission level. Based on numerical results, a precise comparison has been made for the freely propagating premixed flames and the premixed flames with a porous media for various inlet velocities.
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Recommended by Associate Editor Jeong Park
Youngjun Shin received his B.S. degree in Mechanical Engineering from Chungnam National University, Korea, in 2010. He then received his M.S. degree from Hanyang University in 2013. He is currently a research associate in the Department of Mechanical Engineering at Hanyang University in Seoul, Korea. His primary research interest is the combustion instability processes.
Yongmo Kim received his B.S. degree in Mechanical Engineering from Hanyang University, Korea, in 1976. He then received his Ph.D. from University of Alabama in Huntsville in 1987. Dr. Kim is currently a professor in the Department of Mechanical Engineering at Hanyang University in Seoul, Korea. His research interest is combustion modeling.
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Shin, Y., Kim, Y. Numerical modeling for flame dynamics and combustion processes in a two-sectional porous burner with a detailed chemistry. J Mech Sci Technol 28, 4797–4805 (2014). https://doi.org/10.1007/s12206-014-0747-5
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DOI: https://doi.org/10.1007/s12206-014-0747-5