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A Numerical Study on the Influence of CO2 Dilution on Combustion Characteristics of a Turbulent Diffusion Flame

Authors: Yasaman Tohidi, Rouzbeh Riazi, Shidvash Vakilipour, Masoud Mohammadi


The objective of the present study is to numerically investigate the effect of CO2 replacement of N2 in air stream on the flame characteristics of the CH4 turbulent diffusion flame. The Open source Field Operation and Manipulation (OpenFOAM) has been used as the computational tool. In this regard, laminar flamelet and modified k-ε models have been utilized as combustion and turbulence models, respectively. Results reveal that the presence of CO2 in air stream changes the flame shape and maximum flame temperature. Also, CO2 dilution causes an increment in CO mass fraction.

Keywords: CH4 diffusion flame, CO2 dilution, OpenFOAM, turbulent flame.

Digital Object Identifier (DOI):

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[1] Pope III CA, Ezzati M, Dockery DW. Fine-particulate air pollution and life expectancy in the United States. N Engl J Med. 2009 Jan 22;2009(360):376-86.
[2] Liu CY, Chen G, Sipöcz N, Assadi M, Bai XS. Characteristics of oxy-fuel combustion in gas turbines. Applied Energy. 2012 Jan 31;89(1):387-94.
[3] Zheng M, Reader GT, Hawley JG. Diesel engine exhaust gas recirculation––a review on advanced and novel concepts. Energy conversion and management. 2004 Apr 30;45(6):883-900.
[4] Liu F, Guo H, Smallwood GJ, Gülder ÖL. The chemical effects of carbon dioxide as an additive in an ethylene diffusion flame: implications for soot and NO x formation. Combustion and Flame. 2001 Apr 30;125(1):778-87.
[5] Park J, Kim SG, Lee KM, Kim TK. Chemical effect of diluents on flame structure and NO emission characteristic in methane‐air counterflow diffusion flame. International Journal of Energy Research. 2002 Oct 25;26(13):1141-60.
[6] Erete JI, Hughes KJ, Ma L, Fairweather M, Pourkashanian M, Williams A. Effect of CO 2 dilution on the structure and emissions from turbulent, non-premixed methane–air jet flames. Journal of the Energy Institute. 2017 Apr 30;90(2):191-200.
[7] Zhuo L, Jiang Y, Qiu R, An J, Xu W. Effects of Fuel-Side N2, CO2, H2O Dilution on Combustion Characteristics and NOx Formation of Syngas Turbulent Nonpremixed Jet Flames. Journal of Engineering for Gas Turbines and Power. 2014 Jun 1;136(6):061505.
[8] Lock A, Briones AM, Aggarwal SK, Puri IK, Hegde U. Liftoff and extinction characteristics of fuel-and air-stream-diluted methane–air flames. Combustion and flame. 2007 Jun 30;149(4):340-52.
[9] Wang L, Liu Z, Chen S, Zheng C, Li J. Physical and chemical effects of CO2 and H2O additives on counterflow diffusion flame burning methane. Energy & fuels. 2013 Dec 9;27(12):7602-11.
[10] Xu H, Liu F, Sun S, Zhao Y, Meng S, Tang W. Effects of H 2 O and CO 2 diluted oxidizer on the structure and shape of laminar coflow syngas diffusion flames. Combustion and Flame. 2017 Mar 31;177:67-78.
[11] Gascoin N, Yang Q, Chetehouna K. Thermal effects of CO 2 on the NO x formation behavior in the CH 4 diffusion combustion system. Applied Thermal Engineering. 2017 Jan 5;110:144-9.
[12] Gu M, Chu H, Liu F. Effects of simultaneous hydrogen enrichment and carbon dioxide dilution of fuel on soot formation in an axisymmetric coflow laminar ethylene/air diffusion flame. Combustion and Flame. 2016 Apr 30;166:216-28.
[13] Yu B, Lee S, Lee CE. Study of NO x emission characteristics in CH 4/air non-premixed flames with exhaust gas recirculation. Energy. 2015 Nov 30;91:119-27.
[14] Roy RN, Sreedhara S. A numerical study on the influence of airstream dilution and jet velocity on NO emission characteristics of CH 4 and DME bluff-body flames. Fuel. 2015 Feb 15;142:73-80.
[15] Kashir B, Tabejamaat S, Jalalatian N. A numerical study on combustion characteristics of blended methane-hydrogen bluff-body stabilized swirl diffusion flames. International Journal of Hydrogen Energy. 2015 May 18;40(18):6243-58.
[16] URL (No date).
[17] Peters N. Turbulent Combustion. Cambridge University Press; 2000.
[18] URL (Accessed 3 November 1995).
[19] Dally BB, Fletcher DF, Masri AR. Flow and mixing fields of turbulent bluff-body jets and flames. Combustion Theory and Modelling. 1998 Jun 1;2(2):193-219.
[20] Sreedhara S, Huh KY. Modeling of turbulent, two-dimensional nonpremixed CH 4/H 2 flame over a bluffbody using first-and second-order elliptic conditional moment closures. Combustion and flame. 2005 Oct 31;143(1):119-34.
[21] Al-Abdeli YM, Masri AR. Stability characteristics and flowfields of turbulent non-premixed swirling flames. Combustion Theory and Modelling. 2003 Dec 1;7(4):731-66.
[22] Müller HA, Ferraro F, Pfitzner M. Implementation of a Steady Laminar Flamelet Model for non-premixed combustion in LES and RANS simulations. In8th International OpenFOAM Workshop 2013 Jun 11.
[23] Poinsot T, Veynante D. Theoretical and numerical combustion. RT Edwards, Inc.; 2005.
[24] Kalt PA, Al-Abdell YM, Masri AR, Barlow RS. Swirling turbulent non-premixed flames of methane: flow field and compositional structure. Proceedings of the Combustion Institute. 2002 Jan 1;29(2):1913-9.