Porosity effects in flame length of the porous burners

Fatemeh Bahadori, Khadijeh Mirza, Alireza Behroozsarand, Sima Rezvantalab


Furnaces are the devices for providing heat to the industrial systems like boilers, gas turbines and etc. The main challenge of furnaces is emission of huge air pollutants. However, porous burners produce less contaminant compared to others. The quality of the combustion process in the porous burners depends on the length of flame in the porous medium. In this paper, the computational fluid dynamic (CFD) is used to investigate the porosity effects on the flame length of the combustion process in porous burner. The simulation results demonstrate that increasing the porosity increases the flame length and the combustion zone extends forward. So, combustion quality increases and production of carbon monoxide decrease. It is possible to conclude that temperature distribution in low porosity burner is lower and more uniform than high porosity one. Therefore, by increasing the porosity of the burner, the production of nitrogen oxides increases. So, using an intermediate porosity in the burner appears to be reasonable.


Burner, Porous media, Flame, Simulation

Full Text:



Weinberg FJ. The first half-million years of combustion research and today’s burning problems. Fifteenth international symposium on combustion, The Combustion Institute; 1974.

Howell JR, Hall MJ, EUzey JL., Combustion of hydrocarbon fuels within porous inert media, Prog. Energy Combus Sci. 1996; 22: 121-45.

Yoshizawa Y, Sasaki, K, Echigo, R, Analytical Study of the Structure of Radiation Rontrolled Flame, Int. J. Heat and Mass Transfer. 1988; 3l (2): 311-15.

Barra AJ, Diepvens G, Ellzey JL, Henneke MR, Numerical study of the effects of material properties on flame stabilization in a porous burner, Combustion and Flame. 2003 ;( 134) 4: 369-79.

Xie M, Shi J, Deng Y, Liu H, Zhou L, Xu Y, Experimental and numerical investigation on performance of a porous medium burner with reciprocating flow, Fuel. 2009; (88): 206–13.

Francisco Jr RW, Rua F, Costa M, Catapan RC, Oliveira AAM. On the combustion of hydrogen-rich gaseous fuels with low calorific value in a porous burner, Energy & Fuels. 2010; (24), 880-87.

Zheng C-H, Cheng L-M, Li T, Luo Z-Y, Cen K-F. Filtration combustion characteristics of low calorific gas in SiC foams, Fuel. 2010; (89): 233-37.

Mujeebu M A, Abdullah M Z, Mohamad AA, Development of energy efficient porous medium burners on surface and submerged combustion modes, Energy. 2011; (36) 5132-39.

Yu B, Kum SM, Lee CE, Lee S, Combustion characteristics and thermal efficiency for premixed porous-media types of burners, Energy. 2013;(53): 343-50.

Li J, Huang J, Yan M, Zhao D, Zhao J, Wei Z, Wang N, Experimental study of n-heptane/air combustion in meso-scale burners with porous media, Experimental Thermal Fluid Sci. 2014; (52): 47–58.

Afsharvahid S, Alvarado P N, Ashman P J, Dally B B, The effect of surface reactions on the prediction of NOX conversion efficiency in a porous burner, Combustion and Flame. 2013; (160) 2169–81.

Ismail A K, Abdullah M Z, Zubair M, Ahmad Z A, Jamaludin A R, Mustafa K F, Abdullah M N, Application of porous medium burner with micro cogeneration System, Energy. 50; (2013) 131-42.

Gao H, Qu Z, Feng X, Tao W, Combustion of methane/air mixtures in a two-layer porous burner: A comparison of alumina foams, beads, and honeycombs, Experimental Thermal and Fluid Science. 52; (2014) 215–20.

Hackert CL, Ellzey JL, Ezekoye OA, Combustion and Heat Transfer in Model Two-Dimensional Porous Burners, Combustion and Flame. 1999; (116):177–91.

Hsu PF, Evans, WD, Howell JR, Experimental and numerical study of premixed combustion within Nonhomogeneous Porous Ceramics, Combustion Science and Tech. 1993; (90): 149-72.

Durst F, and Trimis D, Compact Porous Medium Burner and Heat Transfer Exchanger for Household Applications, EC project report, 1996; Contact no. JOEC-CT95-0019.

Afsharvahid S, Ashman PJ, Dally BB, Investigation of NOx conversion characteristics in a porous medium, Combustion and Flame, 2008; (152): 604–15

Bakry A, Al-Salaymeh A, Al-Muhtaseb A H, Abu-Jrai A, Trimis D, CO and NOx emissions in porous inert media (PIM) burner system operated under elevated pressure and inlet temperature using a new flame stabilization technique, Chem. Eng. J. 2010; (165): 589–96.

Bakry A. Stabilized premixed combustion within atmospheric gas porous inert medium (PIM) burner, Proceedings of the Institution of Mechanical Engineers Part A-Journal of Power and Energy. 2008; (222):781-89

Iranian Journal of Health, Safety and Environment e-ISSN: :2345-5535 Iran university of Medical sciences, Tehran, Iran