Multidimensional gas turbine combustion modeling Applications and limitations

Mongia, H. C.; Reynolds, R.; Srinivasan, Ram

doi:10.2514/3.9364

Cited by 56 publications

(12 citation statements)

References 14 publications

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“…The first-generation combustor design procedure outlined by Mongia and Smith 60 has been very useful for developing several combustors (Mongia et al 61 ) that exhibited significant technology advances. However, in addition to the model deficiencies identified in the assessments, there were several parameters of importance in gas turbine combustor design that the analytical models could not predict.…”

Section: Combustion Modelingmentioning

confidence: 99%

Combustion and environmental challenges for gas turbines in the 1990s

Gupta

Lilley

1994

Journal of Propulsion and Power

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Section: Combustion Modelingmentioning

confidence: 99%

Combustion and environmental challenges for gas turbines in the 1990s

Gupta

Lilley

1994

Journal of Propulsion and Power

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“…Details of the fuel distribution in the combustion domain and the corresponding gas temperatures, as given by the analytical tools, can give insight to potential regions that influence emissions and performance of combustor. However, due to the incomplete understanding of the various combustion processes and numerical diffusion, the 3-D calculations for practical gas turbine combustors can not be considered quantitatively accurate (Mongia et al, 1986, andSturgess, 1983).…”

Section: Combustor 3-d Analysismentioning

confidence: 99%

Ultra-Low NOx Rich-Lean Combustion

Rizk

Mongia

1990

Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations

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An investigation has been carried out of the influence of the geometry and operating parameters of the rich/quench/lean (RQL) combustion concept on the NOx emissions. The RQL combustor is a three stage, variable geometry system in which fuel is burned in a carefully controlled fuel rich and fuel lean environment. The data utilized in this investigation were obtained under a wide range of operation that simulates the maximum continuous power mode, and for fuels that represent the future distillate types. An expression based on residence time, reaction rates, and mixing rates in each of the combustion zones was derived to estimate the NOx concentration. It was used also to define the range of operation that gives acceptable NOx for future applications. A 3-D combustor flow analysis was conducted to investigate the impact of various system components on the flow field and the total NOx. It was found that for further reduction of NOx modifications to the fuel nozzle and the quench mixer may be required.

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“…In recent years multi-dimensional calculations of non-reacting and reacting flows have augmented empirical design procedures commonly used in the gas turbine industry [Mongia et al , 1986]. Recently, the present authors evaluated several computer codes for low-Btu gas application [Yang and Agrawal, 1990].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulations of Low-Btu Coal Gas Combustion in a Gas Turbine Combustor

Agrawal

Yang

1991

Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations

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A numerical model for turbulent reacting flow is described and applied for predictions in an industrial gas turbine combustor operating on low-Btu coal gas. The model, based on fast-reaction limit, used Favre averaged conservation equations with the standard k-c model of turbulence. Effects of turbulent fluctuations on chemistry are described statistically in terms of the mean, variance and probability density function (assumed to be fldistribution) of the mixture fraction.Two types of geometric approximations, namely axisymmetric and three-dimensional, were used to model the combustor. Computations were performed with (a) no swirl (b) weak swirl and (c) strong swirl at the fuel and primary air inlets. Essentially, the same bulk mean temperature distributions were obtained for axisymmetric and three-dimensional calculations while the computed pattern factors and the liner wall temperatures for the two differed significantly. Complete combustion was predicted with strong swirl, a result supported by the available test data. The maximum liner wall temperature predicted for three-dimensional calculations compared favorably with the experimental data while the predicted maximum exhaust gas temperature differed by =120 K . The difference was attributed to measurement uncertainties, model assumptions and lack of accurate data at the inlets. The maximum flame temperature was below 1,850 K indicating that thermal NOx may be insignificant.

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Multidimensional gas turbine combustion modeling Applications and limitations

Cited by 56 publications

References 14 publications

Combustion and environmental challenges for gas turbines in the 1990s

Combustion and environmental challenges for gas turbines in the 1990s

Ultra-Low NOx Rich-Lean Combustion

Numerical Simulations of Low-Btu Coal Gas Combustion in a Gas Turbine Combustor

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