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Title: Effects of hydrogen enrichment on adiabatic burning velocity and NO formation in methane + air flames

Abstract

Experimental measurements of the adiabatic burning velocity and NO formation in methane + hydrogen + air flames are presented. The hydrogen content in the fuel was varied from 0% to 35%. Non-stretched flames were stabilized on a perforated plate burner at 1 atm. The Heat Flux method was used to determine burning velocities under conditions when the net heat loss of the flame is zero. An overall accuracy of the burning velocities was estimated to be better than {+-}0.8 cm/s in the whole range of enrichment by hydrogen. A procedure for estimation of errors in equivalence ratio was extended to binary fuel mixtures. The relative accuracy of the equivalence ratio was found to be below 1.47%. Adiabatic burning velocities of methane + hydrogen + air mixtures were found in satisfactory agreement with the literature results and with the Konnov model predictions. A new correlation for the adiabatic laminar burning velocity of methane + hydrogen + air mixtures burning at standard conditions was derived. The NO concentrations as a function of equivalence ratio were measured using probe sampling at a fixed distance from the burner. In lean flames enrichment by hydrogen has little effect on [NO], while in rich flames themore » concentration of nitric oxide decreases significantly. The numerical predictions are in good agreement with the experiment. (author)« less

Authors:
; ;  [1]
  1. Department of Mechanical Engineering, Vrije Universiteit Brussel, IR-MECH, Pleinlaan 2, 1050 Brussels (Belgium)
Publication Date:
OSTI Identifier:
20864948
Resource Type:
Journal Article
Resource Relation:
Journal Name: Experimental Thermal and Fluid Science; Journal Volume: 31; Journal Issue: 5; Conference: MCS-4: 4. Mediterranean combustion symposium, Lisbon (Portugal), 6-10 Oct 2005; Other Information: Elsevier Ltd. All rights reserved
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; METHANE; HYDROGEN; AIR; VELOCITY; FLAMES; MIXTURES; NITRIC OXIDE; BURNERS; FORECASTING; CORRELATIONS; ACCURACY; HEAT FLUX; DATA COVARIANCES; TEMPERATURE RANGE 0273-0400 K; ADIABATIC PROCESSES; ATMOSPHERIC PRESSURE

Citation Formats

Coppens, F.H.V., De Ruyck, J., and Konnov, A.A.. Effects of hydrogen enrichment on adiabatic burning velocity and NO formation in methane + air flames. United States: N. p., 2007. Web. doi:10.1016/J.EXPTHERMFLUSCI.2006.04.012.
Coppens, F.H.V., De Ruyck, J., & Konnov, A.A.. Effects of hydrogen enrichment on adiabatic burning velocity and NO formation in methane + air flames. United States. doi:10.1016/J.EXPTHERMFLUSCI.2006.04.012.
Coppens, F.H.V., De Ruyck, J., and Konnov, A.A.. Sun . "Effects of hydrogen enrichment on adiabatic burning velocity and NO formation in methane + air flames". United States. doi:10.1016/J.EXPTHERMFLUSCI.2006.04.012.
@article{osti_20864948,
title = {Effects of hydrogen enrichment on adiabatic burning velocity and NO formation in methane + air flames},
author = {Coppens, F.H.V. and De Ruyck, J. and Konnov, A.A.},
abstractNote = {Experimental measurements of the adiabatic burning velocity and NO formation in methane + hydrogen + air flames are presented. The hydrogen content in the fuel was varied from 0% to 35%. Non-stretched flames were stabilized on a perforated plate burner at 1 atm. The Heat Flux method was used to determine burning velocities under conditions when the net heat loss of the flame is zero. An overall accuracy of the burning velocities was estimated to be better than {+-}0.8 cm/s in the whole range of enrichment by hydrogen. A procedure for estimation of errors in equivalence ratio was extended to binary fuel mixtures. The relative accuracy of the equivalence ratio was found to be below 1.47%. Adiabatic burning velocities of methane + hydrogen + air mixtures were found in satisfactory agreement with the literature results and with the Konnov model predictions. A new correlation for the adiabatic laminar burning velocity of methane + hydrogen + air mixtures burning at standard conditions was derived. The NO concentrations as a function of equivalence ratio were measured using probe sampling at a fixed distance from the burner. In lean flames enrichment by hydrogen has little effect on [NO], while in rich flames the concentration of nitric oxide decreases significantly. The numerical predictions are in good agreement with the experiment. (author)},
doi = {10.1016/J.EXPTHERMFLUSCI.2006.04.012},
journal = {Experimental Thermal and Fluid Science},
number = 5,
volume = 31,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}