Flame stability is a crucial issue in low combustion systems operating at extremely lean conditions. Hydrogen enrichment seems to be a promising option to extend lean blowout limits (LBO) of natural gas combustion. This experimental study addresses flame stability enhancement and reduction in turbulent, high-pressure, lean premixed methane/air flames in a generic combustor capable of a wide range of operating conditions. Lean blowout limits and emissions are presented for pressures up to , bulk velocities in the range of 32–, two different preheating temperatures (, ), and a range of fuel mixtures from pure methane to 20% by volume. The influence of turbulence on LBO limits is also discussed. In addition to the investigation of perfectly premixed -enriched flames, LBO and are also discussed for hydrogen piloting. Experiments have revealed that a mixture of 20% hydrogen and 80% methane, by volume, can typically extend the lean blowout limit by compared to pure methane. The flame temperature at LBO is lower resulting in the reduction of concentration by ).
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April 2007
Technical Papers
Lean Blowout Limits and Emissions of Turbulent, Lean Premixed, Hydrogen-Enriched Methane/Air Flames at High Pressure
P. Griebel,
P. Griebel
Combustion Research,
e-mail: peter.griebel@psi.ch
Paul Scherrer Institut (PSI)
, 5232 Villigen PSI, Switzerland
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E. Boschek,
E. Boschek
Combustion Research,
Paul Scherrer Institut (PSI)
, 5232 Villigen PSI, Switzerland
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P. Jansohn
P. Jansohn
Combustion Research,
Paul Scherrer Institut (PSI)
, 5232 Villigen PSI, Switzerland
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P. Griebel
Combustion Research,
Paul Scherrer Institut (PSI)
, 5232 Villigen PSI, Switzerlande-mail: peter.griebel@psi.ch
E. Boschek
Combustion Research,
Paul Scherrer Institut (PSI)
, 5232 Villigen PSI, Switzerland
P. Jansohn
Combustion Research,
Paul Scherrer Institut (PSI)
, 5232 Villigen PSI, SwitzerlandJ. Eng. Gas Turbines Power. Apr 2007, 129(2): 404-410 (7 pages)
Published Online: August 15, 2006
Article history
Received:
July 3, 2006
Revised:
August 15, 2006
Citation
Griebel, P., Boschek, E., and Jansohn, P. (August 15, 2006). "Lean Blowout Limits and Emissions of Turbulent, Lean Premixed, Hydrogen-Enriched Methane/Air Flames at High Pressure." ASME. J. Eng. Gas Turbines Power. April 2007; 129(2): 404–410. https://doi.org/10.1115/1.2436568
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