Full Content is available to subscribers

Subscribe/Learn More  >

Experimental and Numerical Investigation on the Laminar Flame Speed of CH4/O2 Mixtures Diluted With CO2 and H2O

[+] Author Affiliations
A. N. Mazas

Air Liquide, Jouy-en-Josas, France

D. A. Lacoste, T. Schuller

Ecole Centrale Paris, Chatenay-Malabry, France

Paper No. GT2010-22512, pp. 411-421; 11 pages
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 2: Combustion, Fuels and Emissions, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4397-0 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME


The effects of CO2 and H2 O addition on premixed oxy-fuel combustion are investigated with experiments and numerical simulations on the laminar flame speed of CH4 /O2 /CO2 /H2 O(v) and CH4 /O2 /N2 /H2 O(v) mixtures, at atmospheric pressure and for a reactants inlet temperature Tu = 373 K. Experiments are conducted with steady laminar conical premixed flames over a range of operating conditions representative of oxy-fuel combustion with flue gas recirculation. The relative O2 -to-CO2 and O2 -to-N2 ratios, respectively defined as O2 /(O2 +CO2 ) (mol.) and O2 /(O2 +N2 ) (mol.), are varied from 0.21 to 1.0. The equivalence ratio of the mixtures ranges from 0.5 to 1.5, and the steam molar fraction in the reactive mixture is varied from 0 to 0.45. Laminar flame speeds are measured with the flame area method using a Schlieren apparatus. Experiments are completed by simulations with the PREMIX code using the detailed kinetic mechanism GRI-mech. 3.0. Numerical predictions are found in good agreement with experimental data for all cases explored. It is also shown that the laminar flame speed of CH4 /O2 /N2 mixtures diluted with steam H2 O(v) features a quasi-linear decrease when increasing the diluent molar fraction, even at high dilution rates. Effects of N2 replacement by CO2 in wet reactive mixtures are then investigated. A similar quasi-linear decrease of the flame speed is observed for CH4 /O2 /CO2 H2 O-diluted flames. For a similar flame speed in dry conditions, results show a larger reduction of the burning velocity for CH4 /O2 /N2 /H2 O mixtures than for CH4 /O2 /CO2 /H2 O mixtures, when the steam molar fraction is increased. Finally, it is observed that the laminar flame speed of weakly (CO2 , H2 O)-diluted CH4 /O2 mixtures is underestimated by the GRI-mech 3.0 predictions.

Copyright © 2010 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In