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    Lean Blowout Limits and NOx Emissions of Turbulent, Lean Premixed, Hydrogen-Enriched Methane/Air Flames at High Pressure

    Source: Journal of Engineering for Gas Turbines and Power:;2007:;volume( 129 ):;issue: 002::page 404
    Author:
    P. Griebel
    ,
    E. Boschek
    ,
    P. Jansohn
    DOI: 10.1115/1.2436568
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Flame stability is a crucial issue in low NOx 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 NOx 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 NOx emissions are presented for pressures up to 14bar, bulk velocities in the range of 32–80m∕s, two different preheating temperatures (673K, 773K), and a range of fuel mixtures from pure methane to 20% H2∕80%CH4 by volume. The influence of turbulence on LBO limits is also discussed. In addition to the investigation of perfectly premixed H2-enriched flames, LBO and NOx 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 ∼10% compared to pure methane. The flame temperature at LBO is ∼60K lower resulting in the reduction of NOx concentration by ≈35%(0.5→0.3ppm∕15%O2).
    keyword(s): Temperature , Turbulence , Flames , Hydrogen , Methane , Emissions , Mixtures , Fuels , High pressure (Physics) AND Combustion chambers ,
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      Lean Blowout Limits and NOx Emissions of Turbulent, Lean Premixed, Hydrogen-Enriched Methane/Air Flames at High Pressure

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    http://yetl.yabesh.ir/yetl1/handle/yetl/135737
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    • Journal of Engineering for Gas Turbines and Power

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    contributor authorP. Griebel
    contributor authorE. Boschek
    contributor authorP. Jansohn
    date accessioned2017-05-09T00:23:43Z
    date available2017-05-09T00:23:43Z
    date copyrightApril, 2007
    date issued2007
    identifier issn1528-8919
    identifier otherJETPEZ-26949#404_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/135737
    description abstractFlame stability is a crucial issue in low NOx 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 NOx 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 NOx emissions are presented for pressures up to 14bar, bulk velocities in the range of 32–80m∕s, two different preheating temperatures (673K, 773K), and a range of fuel mixtures from pure methane to 20% H2∕80%CH4 by volume. The influence of turbulence on LBO limits is also discussed. In addition to the investigation of perfectly premixed H2-enriched flames, LBO and NOx 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 ∼10% compared to pure methane. The flame temperature at LBO is ∼60K lower resulting in the reduction of NOx concentration by ≈35%(0.5→0.3ppm∕15%O2).
    publisherThe American Society of Mechanical Engineers (ASME)
    titleLean Blowout Limits and NOx Emissions of Turbulent, Lean Premixed, Hydrogen-Enriched Methane/Air Flames at High Pressure
    typeJournal Paper
    journal volume129
    journal issue2
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.2436568
    journal fristpage404
    journal lastpage410
    identifier eissn0742-4795
    keywordsTemperature
    keywordsTurbulence
    keywordsFlames
    keywordsHydrogen
    keywordsMethane
    keywordsEmissions
    keywordsMixtures
    keywordsFuels
    keywordsHigh pressure (Physics) AND Combustion chambers
    treeJournal of Engineering for Gas Turbines and Power:;2007:;volume( 129 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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