Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Design Improvement Survey for NOx Emissions Reduction of a Heavy-Duty Gas Turbine Partially Premixed Fuel Nozzle Operating With Natural Gas: Numerical Assessment

[+] Author and Article Information
Alessandro Innocenti

Department of Industrial Engineering,
University of Florence,
Via S. Marta 3,
Florence 50139, Italy
e-mail: alessandro.innocenti@htc.de.unifi.it

Antonio Andreini, Bruno Facchini

Department of Industrial Engineering,
University of Florence,
Via S. Marta 3,
Florence 50139, Italy

Matteo Cerutti, Gianni Ceccherini, Giovanni Riccio

GE Oil & Gas Nuovo Pignone s.r.l.,
Via F. Matteucci 2,
Florence 50127, Italy

1Corresponding author.

Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received July 15, 2015; final manuscript received July 22, 2015; published online August 12, 2015. Editor: David Wisler.

J. Eng. Gas Turbines Power 138(1), 011501 (Aug 12, 2015) (9 pages) Paper No: GTP-15-1324; doi: 10.1115/1.4031144 History: Received July 15, 2015

A numerical investigation of a low NOx partially premixed fuel nozzle for heavy-duty gas turbine applications is presented in this paper. Availability of results from a recent test campaign on the same fuel nozzle architecture allowed the exhaustive comparison study presented in this work. At first, an assessment of the turbulent combustion model was carried out, with a critical investigation of the expected turbulent combustion regimes in the system and taking into account the partially premixed nature of the flame due to the presence of diffusion type pilot flames. In particular, the fluent partially premixed combustion model and a flamelet approach are used to simulate the flame. The laminar flamelet database is generated using the flamelet generated manifold (FGM) chemistry reduction technique. Species and temperature are parameterized by mixture fraction and progress variable. Comparisons with calculations with partially premixed model and the steady diffusion flamelet (SDF) database are made for the baseline configuration in order to discuss possible gains associated with the introduced dimension in the FGM database (reaction progress), which makes it possible to account for nonequilibrium effects. Numerical characterization of the baseline nozzle has been carried out in terms of NOx. Computed values for both the baseline and some alternative premixer designs have been then compared with experimental measurements on the reactive test rig at different operating conditions and different split ratios between main and pilot fuel. Numerical results allowed pointing out the fundamental NOx formation processes, both in terms of spatial distribution within the flame and in terms of different formation mechanisms. The obtained knowledge would allow further improvement of fuel nozzle design.

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Correa, S. M. , 1998, “ Power Generation and Aero Propulsion Gas Turbines: From Combustion Science to Combustion Technology,” Proc. Combust. Inst., 27(2), pp. 1793–1807. [CrossRef]
Lefebvre, A. H. , 1999, Gas Turbine Combustion, Taylor and Francis, Philadelphia, PA.
Lyons, V. J. , 1982, “ Fuel/Air Non-Uniformity Effect on Nitric Oxide Emissions,” AIAA J., 20(5), pp. 660–665. [CrossRef]
Fric, T. F. , 1993, “ Effects of Fuel Air Unmixedness on NOx Emissions,” J. Propul. Power, 9(5), pp. 708–713. [CrossRef]
Polifke, W. , 1995, Fundamental and Practical Limitations of NOx Reduction in Lean-Premixed Combustion, ABB Corporate Research, Baden-Dätwil, Switzerland.
Dunn-Rankin, D. , 2007, Lean Combustion Technology and Control, Academic Press, Irvine, CA.
Albrecht, P. , 2010, Strategy for Emissions and Instability Prevention in Gas Turbines, Technische Universität Berlin, Berlin.
Donini, A. , Bastiaans, R. J. , van Oijen, J. A. , and de Goey, L. P. H. , 2014, “ The Application of Flamelet-Generated Manifold in the Modeling of Stratified Premixed Cooled Flames,” ASME Paper No. GT2014-26210.
Raman, V. , and Pitsch, H. , 2005, “ Large-Eddy Simulation of a Bluff-Body-Stabilized Non-Premixed Flame Using a Recursive Filter-Refinement Procedure,” Combust. Flame, 142(4), pp. 329–347. [CrossRef]
Nguyen, P.-D. , Vervisch, L. , Subramanian, V. , and Domingo, P. , 2010, “ Multidimensional Flamelet-Generated Manifolds for Partially Premixed Combustion,” Combust. Flame, 157(1), pp. 43–61. [CrossRef]
Vreman, A. , Albrecht, B. , van Oijen, J. , de Goey, L. , and Bastiaans, R. , 2008, “ Premixed and Non-Premixed Generated Manifolds in Large-Eddy Simulation of Sandia Flame D and F,” Combust. Flame, 153(3), pp. 394–416. [CrossRef]
Ramaekers, W. , van Oijen, J. , and de Goey, L. , 2012, “ Stratified Turbulent Bunsen Flames: Flame Surface Analysis and Flame Surface Density Modelling,” Combust. Theory Model., 16(6), pp. 943–975. [CrossRef]
Donini, A. , Martin, S. , Bastiaans, R. , van Oijen, J. , and de Goey, L. , 2013, “ Numerical Simulations of a Premixed Turbulent Confined Jet Flame Using the Flamelet Generated Manifold Approach With Heat Loss Inclusion,” ASME Paper No. GT2013-94363.
Donini, A. , Martin, S. , Bastiaans, R. , van Oijen, J. , and de Goey, L. , 2013, “ High Pressure Jet Flame Numerical Analysis of CO Emissions by Means of the Flamelet Generated Manifolds Technique,” 11th International Conference of Numerical Analysis and Applied Mathematics (ICNAAM), Rhodes, Sept. 21–27, Vol. 1558, pp. 136–139.
Olbricht, C. , Hahn, F. , Ketelheun, A. , and Janicka, J. , 2010, “ Strategies for Presumed PDF Modeling for LES With Premixed Flamelet-Generated Manifolds,” J. Turbul., 11(38), p. N38.
van Oijen, J. , and de Goey, L. , 2000, “ Modelling of Premixed Laminar Flames Using Flamelet-Generated Manifolds,” Combust. Sci. Technol., 161(1), pp. 113–137. [CrossRef]
Innocenti, A. , Andreini, A. , Giusti, A. , Facchini, B. , Cerutti, M. , Ceccherini, G. , and Riccio, G. , 2014, “ Numerical Investigations of NOx Emissions of a Partially Premixed Burner for Natural Gas Operations in Industrial Gas Turbine,” ASME Paper No. GT2014-26906.
Andreini, A. , Facchini, B. , Innocenti, A. , and Cerutti, M. , 2014, “ Numerical Analysis of a Low NOx Partially Premixed Burner for Industrial Gas Turbine Applications,” Energy Procedia, 45, pp. 1382–1391. [CrossRef]
Cerutti, M. , Modi, R. , Kalitan, D. , and Singh, K. K. , 2015, “ Design Improvement Survey for NOx Emissions Reduction of a Heavy-Duty Gas Turbine Partially Premixed Fuel Nozzle Operating With Natural Gas: Experimental Campaign,” ASME Paper No. GT2015-43516.
Zimont, V. L. , Moreu, V. , Battaglia, V. , and Modi, R. , 2011, “ RANS and LES Modelling of the GE10 Burner,” Energy Power Eng., 3(5), pp. 607–615. [CrossRef]
Ramaekers, W. , Albrecht, B. , van Oijen, J. , de Goey, L. , and Eggels, R. , 2005, “ The Application of Flamelet Generated Manifolds in Partially-Premixed Flames,” Fluent Benelux User Group Meeting, Wavre, Belgium, Oct. 6–7, p. 3D.
ANSYS, 2011, ansys fluent-Theory Guide , Release 14.0, ANSYS Inc., Canonsburg, PA.
Missaghi, M. , Pourkashanian, M. , Williams, A. , and Yap, L. , 1990, “ The Predictions of NO Emissions From an Industrial Burner,” American Flame Day Conference, San Francisco, Oct. 8–10.
DeSoete, G. G. , 1975, “ Overall Reaction Rates of NO and N2 Formation From Fuel Nitrogen,” Symp. (Int.) Combust., 15(1), pp. 1093–1102.
Malte, P. , and Pratt, D. , 1975, “ Measurement of Atomic Oxygen and Nitrogen Oxides in Jet-Stirred Combustion,” Symp. (Int.) Combust., 15(1), pp. 1061–1070. [CrossRef]


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Fig. 1

DACRS premixer scheme

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Fig. 2

Axial velocity and TKE contours

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Fig. 3

CH4 mass fraction profiles along the premixer

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Fig. 4

Alternative premixer designs: SW1 (a), SW3 (b), and SW4 (c)

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Fig. 5

Scheme of the workflow

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Fig. 6

Computed and scaled profiles: data matching

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Fig. 7

Reactive test rig: computational domain and mesh

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Fig. 8

Progress variable (a) and nondimensional temperature (b) contours: comparison between SDF model and the FGM one

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Fig. 9

Progress variable source terms: FR (top) and TFC (bottom)

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Fig. 10

No emissions for the tested combustion models

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Fig. 11

Global correlation between numerical results and experimental data

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Fig. 12

No emissions against flame temperature, for the simulated configurations

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Fig. 13

Scaled mixture fraction and temperature in the combustor with SW0 and SW4 designs

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Fig. 14

Contributions of the no formation mechanisms to the global reaction rate

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Fig. 15

No emissions against pilot split

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Fig. 16

No emissions against combustor pressure drop

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Fig. 17

NOx emissions against combustion residence time in the combustion chamber

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Fig. 18

Contours of RMS of temperature for two different pressure drops



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