Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32146
Numerical Study on CO2 Pollution in an Ignition Chamber by Oxygen Enrichment

Authors: Zohreh Orshesh


In this study, a 3D combustion chamber was simulated using FLUENT 6.32. Aims to obtain accurate information about the profile of the combustion in the furnace and also check the effect of oxygen enrichment on the combustion process. Oxygen enrichment is an effective way to reduce combustion pollutant. The flow rate of air to fuel ratio is varied as 1.3, 3.2 and 5.1 and the oxygen enriched flow rates are 28, 54 and 68 lit/min. Combustion simulations typically involve the solution of the turbulent flows with heat transfer, species transport and chemical reactions. It is common to use the Reynolds-averaged form of the governing equation in conjunction with a suitable turbulence model. The 3D Reynolds Averaged Navier Stokes (RANS) equations with standard k-ε turbulence model are solved together by Fluent 6.3 software. First order upwind scheme is used to model governing equations and the SIMPLE algorithm is used as pressure velocity coupling. Species mass fractions at the wall are assumed to have zero normal gradients.Results show that minimum mole fraction of CO2 happens when the flow rate ratio of air to fuel is 5.1. Additionally, in a fixed oxygen enrichment condition, increasing the air to fuel ratio will increase the temperature peak. As a result, oxygen-enrichment can reduce the CO2 emission at this kind of furnace in high air to fuel rates.

Keywords: Combustion chamber, Oxygen enrichment, Reynolds Averaged Navier- Stokes, CO2 emission

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1412


[1] Y. Khazraii, K. Daneshvar, H. PoorkhademNamin, "Numerical Simulation on Nox Emission in Liquid Fuel Spray Flames," Journal of Modeling and Optimization, International, Vol. 1, No. 4, October 2011.
[2] Energy Center of Wisconsin, "Oxygen-Enriched Combustion Technologies," fact sheet, 0300/7307, Publication number 1-426, 2000.
[3] Industrial Technologies Program Energy Efficiency and Renewable Energy U.S.," Energy Tips - Process Heating," Department of Energy Washington, DC 20585-0121, Tip Sheet #3, September 2005.
[4] A. Frassoldati, S. Firgerio, E. Colombo, F. Inzoli and T. Faravelli, "Determination of Nox Emissions from Strong Swirling Confined Flames with an Integrated Cfd-Based Procedure," Chem. Eng. Sci., Vol. 60. No. 11, 2851-2869, June 2005.
[5] Hamzeh Jafar Karimi, Mohammad Hassan Saidi, "Heat Transfer and Energy Analysis of a Pusher Type Reheating Furnace Using Oxygen Enhanced Air for Combustion," Journal of Iron and Steel Research, International, Vol. 17, Issue 4, April 2010, Pages 12-17.
[6] S.S. Daood, W. Nimmo, P. Edge, B.M. Gibbs, "Deep-staged oxygen enriched combustion of coal," Fuel, Available online 17 February 2011.
[7] L. Álvarez, M. Gharebaghi, J.M. Jones, M. Pourkashanian, A. Williams, J. Riaza, C. Pevida, J.J. Pis, F. Rubiera, " numerical investigation of NO emission from an entrained flow reactor under oxy-coal conditions, "Fuel Processing Technology, Volume 93, Issue 1, January 2012, Pages 53-64.
[8] Fluent Inc., Fluent 6.3 User's Guide, 2007.
[9] B.E. Launder and D.B. Spalding, "The Numerical Computation Of Turbulent Flows," Comp. Meth. Appl. Mech. Eng., Vol. 3, No. 2, 269- 289, March 1974.
[10] D.L. Baulch, D.D. Drysdall and D.G. Horne, "Evaluated Kinetic Data For High Temperature Reactions," Butterworth, 1973.
[11] M. Darbandi, A. Banaeizadeh and G. E. Schneider, "Implicit Finite Volume Method to Simulate Reacting Flow" 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, 10-13 Jan, 2005.
[12] Elkaim, D., Reggio, M., and Camarero, R., "Control Volume Finite- Element Solution of A Confined Turbulent Diffusion Flame," Numerical Heat Transfer, Vol. 23, 1993, pp.259-279.
[13] Smoot, J.L, and Lewis, H.M., "Turbulent Gaseous Combustion: Part 1, Local Species Concentration Measurements," Combustion and Flame, Vol. 42, 1981, pp.183-196.