9 ppm NOx/CO Combustion System for “F” Class Industrial Gas Turbines

Vandervort, Christian

doi:10.1115/1.1362661

Cited by 24 publications

(6 citation statements)

References 3 publications

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“…Contemporary stationary gas turbine combustors operate at thermal intensities of 15 to 25 MW/m3.atm [25]. The cylindrical Combustor used here was at a combustion intensity of 36MW/m3.atm and heat load of 6.25 kW so that the results presented here are relevant to contemporary gas turbine combustion conditions.…”

Section: Resultsmentioning

confidence: 99%

Fuel injection effects on distribution reaction in a high intensity combustor

Said

Gupta

2016

Fuel

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The role of dual location fuel injection (versus single injection) is examined for improved mixture preparation with enhanced reaction distribution in the combustor that offers reduced emissions. A cylindrical combustor was used at a combustion intensity of 36MW/m3.atm and heat load of 6.25 kW. Three different configurations were examined for the effect of dual location fuel injection using methane as the fuel. NO reduction of 48% was achieved with fuel injected at two locations versus single location at an overall equivalence ratio of 0.7. The OH* Chemiluminescence intensity distribution with dual location fuel injection showed the reaction zone to shift further downstream that provided longer fuel mixture preparation time prior to ignition under favorable fuel distribution conditions. The longer mixing time helped to improve mixture preparation with lower emissions. The NO* chemiluminescence signatures supported the results obtained on reduced NO emission. Mean to maximum OH* signal showed that dual location fuel injection enhanced distributed reaction at certain fuel

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Section: Resultsmentioning

confidence: 99%

Fuel injection effects on distribution reaction in a high intensity combustor

Said

Gupta

2016

Fuel

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“…The objective of this paper is to consider the factors influencing heat release distribution, or more fundamentally, flame position and stabilization locations, in premixed combustors. In particular, we focus on swirling flows with a center body, a common geometry for both commercial low NOx combustor hardware [1,2] and in fundamental studies of swirling flows [3,4]. This paper continues work from our group described in Refs.…”

Section: Introductionmentioning

confidence: 90%

Flame and Flow Topologies in an Annular Swirling Flow

Chterev

Foley

Kostka

et al. 2013

Volume 1B: Combustion, Fuels and Emissions

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A variety of different flame configurations and heat release distributions, with their associated flow fields, can exist in high swirl, annular flows. Each of these different configurations, in turn, has different thermoacoustic sensitivities and influences on combustor emissions, nozzle life, and liner heating. These different configurations arise because at least three flame stabilization locations are present, associated with the inner and outer shear layers of the annulus, and the stagnation point of the vortex breakdown region. This paper discusses the flame and flow topologies that exist in these flows. These results illustrate the importance of the sensitivity of flame configurations to geometric (such as centerbody size and shape, combustor diameter, exhaust contraction) and operational (e.g., bulkhead temperature, preheat temperature, fuel air ratio) parameters. We particularly emphasize the centerbody shape as differentiating between two different families of flame shapes. Results are shown illustrating the time averaged and instantaneous flame shape and flow fields, using high speed PIV, OH-PLIF, and luminosity imaging.

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“…Studies [2][3][4][5][6][7][8][9] have focused on development of low NO x combustors with the viewpoint of producing lower emissions. These combustors are different in designs, as some are annular, can, or silo type.…”

Section: Introductionmentioning

confidence: 99%

Predictions of Flow and Heat Transfer in Low Emission Combustors

Esposito

Ekkad

2008

Heat Transfer Engineering

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Flow and heat transfer predictions in modern low emission combustors are critical to maintaining the liner wall at reasonable temperatures. This study is the first to focus on a critical issue for combustor design. The objective of this paper is to understand the effect of different swirl angle for a dry low emission (DLE) combustor on flow and heat transfer distributions. This paper provides the effect of fuel nozzle swirl angle on velocity distributions, temperature, and surface heat transfer coefficients. A simple test model is investigated with flow through fuel nozzles without reactive flow. The fuel nozzle angle is varied to obtain different swirl conditions inside the combustor. The effect of flow Reynolds number and swirl number are investigated using FLUENT. Different RANS-based turbulence models are tested to determine the ability of these models to predict the swirling flow. For comparison, different turbulence models such as standard k − ε, realizable k − ε, and shear stress transport (SST) k − ω turbulence model were studied for non-reactive flow conditions. The results show that, for a high degree swirl flow, the SST k −ω model can provide more reasonable predictions for recirculation and high velocity gradients. With increasing swirl angle, the average surface heat transfer coefficient increases while the average static temperature will decrease. Preliminary analysis shows that the k − ω model is the best model for predicting swirling flows. Also critical is the effect of the swirling flows on the liner wall heat transfer. The strength and magnitude of the swirl determines the local heat transfer maxima location. This location needs to be cooled more effectively by various cooling schemes.

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9 ppm NOx/CO Combustion System for “F” Class Industrial Gas Turbines

Cited by 24 publications

References 3 publications

Fuel injection effects on distribution reaction in a high intensity combustor

Fuel injection effects on distribution reaction in a high intensity combustor

Flame and Flow Topologies in an Annular Swirling Flow

Predictions of Flow and Heat Transfer in Low Emission Combustors

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