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

A Large-Eddy Simulation–Linear-Eddy Model Study of Preferential Diffusion Processes in a Partially Premixed Swirling Combustor With Synthesis Gases

[+] Author and Article Information
Shaoshuai Li

Department of Thermal Engineering,
Tsinghua University,
Beijing 100084, China
e-mail: zhengbankuaile@aliyun.com

Yunzhe Zheng

Department of Thermal Engineering,
Tsinghua University,
Beijing 100084, China
e-mail: yzzheng@eppei.com

Daniel Mira

CASE Department,
Barcelona Supercomputing Center,
Barcelona 08034, Spain
e-mail: daniel.mira@bsc.es

Suhui Li

Professor
Department of Thermal Engineering,
Tsinghua University,
Beijing 100084, China
e-mail: lisuhui@tsinghua.edu.cn

Min Zhu

Professor
Department of Thermal Engineering,
Tsinghua University,
Beijing 100084, China
e-mail: zhumin@mail.tsinghua.edu.cn

Xi Jiang

Professor
Department of Engineering,
Lancaster University,
Lancaster LA1 4YR, UK
e-mail: x.jiang@lancaster.ac.uk

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 June 19, 2016; final manuscript received July 12, 2016; published online September 27, 2016. Editor: David Wisler.

J. Eng. Gas Turbines Power 139(3), 031501 (Sep 27, 2016) (12 pages) Paper No: GTP-16-1235; doi: 10.1115/1.4034446 History: Received June 19, 2016; Revised July 12, 2016

A lean partially premixed swirling combustor operated with synthesis gases is studied using large-eddy simulation (LES). The linear-eddy model (LEM) is employed to close the unresolved scalar fluxes with the nonunity Lewis number assumption. Several terms resulting from the LES filtering operation are not modeled but directly resolved considering their unique length and time scales, such as molecular diffusion, scalar mixing, and chemical reactions. First, the validation results on a well-established jet flame indicate a good level of correlation with the experimental data and allow a further analysis of syngas combustion on a practical combustor. Second, the effects of preferential diffusion on the characteristics of flow and combustion dynamics on a lean partially premixed swirling combustor are investigated. The obtained results are expected to provide useful information for the design and operation of gas turbine combustion systems using syngas fuels.

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References

Lipatnikov, A. , and Chomiak, J. , 2005, “ Molecular Transport Effects on Turbulent Flame Propagation and Structure,” Prog. Energy Combust. Sci., 31(1), pp. 1–73. [CrossRef]
Law, C. , and Kwon, O. , 2004, “ Effects of Hydrocarbon Substitution on Atmospheric Hydrogen–Air Flame Propagation,” Int. J. Hydrogen Energy, 29(8), pp. 867–879. [CrossRef]
Miller, D. , Evers, R. , and Skinner, G. , 1963, “ Effects of Various Inhibitors on Hydrogen–Air Flame Speeds,” Combust. Flame, 7, pp. 137–142. [CrossRef]
Hu, E. , Huang, Z. , He, J. , Jin, C. , and Zheng, J. , 2009, “ Experimental and Numerical Study on Laminar Burning Characteristics of Premixed Methane–Hydrogen–Air Flames,” Int. J. Hydrogen Energy, 34(11), pp. 4876–4888. [CrossRef]
Halter, F. , Chauveau, C. , and Gökalp, I. , 2007, “ Characterization of the Effects of Hydrogen Addition in Premixed Methane/Air Flames,” Int. J. Hydrogen Energy, 32(13), pp. 2585–2592. [CrossRef]
Fu, J. , Tang, C. , Jin, W. , and Huang, Z. , 2014, “ Effect of Preferential Diffusion and Flame Stretch on Flame Structure and Laminar Burning Velocity of Syngas Bunsen Flame Using OH-PLIF,” Int. J. Hydrogen Energy, 39(23), pp. 12187–12193. [CrossRef]
Liu, F. , and Gülder, Ö. , 2005, “ Effects of H2 and H Preferential Diffusion and Unity Lewis Number on Superadiabatic Flame Temperatures in Rich Premixed Methane Flames,” Combust. Flame, 143(3), pp. 264–281. [CrossRef]
Zamashchikov, V. , Namyatov, I. , Bunev, V. , and Babkin, V. , 2004, “ On the Nature of Superadiabatic Temperatures in Premixed Rich Hydrocarbon Flames,” Combust., Explos. Shock Waves, 40(1), pp. 32–35. [CrossRef]
De Charentenay, J. , and Ern, A. , 2002, “ Multicomponent Transport Impact on Turbulent Premixed H2/O2 Flames,” Combust. Theory Modell., 6(3), pp. 439–462. [CrossRef]
Im, H. , and Chen, J. , 2002, “ Preferential Diffusion Effects on the Burning Rate of Interacting Turbulent Premixed Hydrogen–Air Flames,” Combust. Flame, 131(3), pp. 246–258. [CrossRef]
Bell, J. , Cheng, R. , Day, M. , and Shepherd, I. , 2007, “ Numerical Simulation of Lewis Number Effects on Lean Premixed Turbulent Flames,” Proc. Combust. Inst., 31(1), pp. 1309–1317. [CrossRef]
Day, M. , Bell, J. , Bremer, P.-T. , Pascucci, V. , Beckner, V. , and Lijewski, M. , 2009, “ Turbulence Effects on Cellular Burning Structures in Lean Premixed Hydrogen Flames,” Combust. Flame, 156(5), pp. 1035–1045. [CrossRef]
Dinkelacker, F. , Manickam, B. , and Muppala, S. , 2011, “ Modelling and Simulation of Lean Premixed Turbulent Methane/Hydrogen/Air Flames With an Effective Lewis Number Approach,” Combust. Flame, 158(9), pp. 1742–1749. [CrossRef]
Barlow, R. S. , Dunn, M. J. , Sweeney, M. S. , and Hochgreb, S. , 2012, “ Effects of Preferential Transport in Turbulent Bluff-Body-Stabilized Lean Premixed CH4/Air Flames,” Combust. Flame, 159(8), pp. 2563–2575. [CrossRef]
Drake, M. , and Blint, R. , 1988, “ Structure of Laminar Opposed-Flow Diffusion Flames With CO/H2/N2 Fuel,” Combust. Sci. Technol., 61(4–6), pp. 187–224. [CrossRef]
Wang, P. , Hu, S. , and Pitz, R. , 2007, “ Numerical Investigation of the Curvature Effects on Diffusion Flames,” Proc. Combust. Inst., 31(1), pp. 989–996. [CrossRef]
Kim, J. , Park, J. , Kwon, O. , Lee, E. , Yun, J. , and Keel, S. , 2008, “ Preferential Diffusion Effects in Opposed-Flow Diffusion Flame With Blended Fuels of CH4 and H2,” Int. J. Hydrogen Energy, 33(2), pp. 842–850. [CrossRef]
Drake, M. , Pitz, R. , and Lapp, M. , 1986, “ Laser Measurements on Nonpremixed & Air Flames for Assessment of Turbulent Combustion Models,” AIAA J., 24(6), pp. 905–917. [CrossRef]
Long, M. , Stårner, S. , and Bilger, R. , 1993, “ Differential Diffusion in Jets Using Joint PLIF and Lorenz-Mie Imaging,” Combust. Sci. Technol., 92(4–6), pp. 209–224. [CrossRef]
Pitsch, H. , 2000, “ Unsteady Flamelet Modeling of Differential Diffusion in Turbulent Jet Diffusion Flames,” Combust. Flame, 123(3), pp. 358–374. [CrossRef]
Hilbert, R. , and Thévenin, D. , 2004, “ Influence of Differential Diffusion on Maximum Flame Temperature in Turbulent Nonpremixed Hydrogen/Air Flames,” Combust. Flame, 138(1), pp. 175–187. [CrossRef]
Dinesh, K. , Jiang, X. , Van, J. , Bastiaans, R. , and De Goey, L. , 2013, “ Hydrogen-Enriched Nonpremixed Jet Flames: Effects of Preferential Diffusion,” Int. J. Hydrogen Energy, 38(11), pp. 4848–4863. [CrossRef]
Menon, S. , Yeung, P. , and Kim, W. , 1996, “ Effect of Subgrid Models on the Computed Interscale Energy Transfer in Isotropic Turbulence,” Comput. Fluids, 25(2), pp. 165–180. [CrossRef]
Calhoon, W. H. , 1996, “ On Subgrid Combustion Modeling for Large-Eddy Simulations,” Ph.D. thesis, Georgia Institute of Technology, Atlanta, GA.
Kerstein, A. , 1992, “ Linear-Eddy Modeling of Turbulent Transport. Part 4. Structure of Diffusion Flames,” Combust. Sci. Technol., 81(1–3), pp. 75–96. [CrossRef]
Martinez, D. M. , Jiang, X. , Moulinec, C. , and Emerson, D. , 2013, “ Numerical Simulations of Turbulent Jet Flames With Non-Premixed Combustion of Hydrogen-Enriched Fuels,” Comput. Fluids, 88, pp. 688–701. [CrossRef]
Smith, T. , 1998, “ Unsteady Simulations of Turbulent Premixed Reacting Flows,” Ph.D. thesis, Georgia Institute of Technology, Atlanta, GA.
Menon, S. , and Kerstein, A. , 2011, “ The Linear-Eddy Model,” Turbulent Combustion Modeling, Springer, Dordrecht, The Netherlands, pp. 221–247.
Magnussen, B. , 1989, “ The Eddy Dissipation Concept for Turbulent Combustion Modelling: Its Physical and Practical Implications,” Division of Thermodynamics, Norwegian Institute of Technology, Trondheim, Norway, Report N-7034.
Zheng, Y. , Zhu, M. , Martinez, D. , and Jiang, X. , 2013, “ Large-Eddy Simulation of Mixing and Combustion in a Premixed Swirling Combustor With Synthesis Gases,” Comput. Fluids, 88, pp. 702–714. [CrossRef]
Boivin, P. , Jiménez, C. , Sánchez, A. , and Williams, F. , 2011, “ A Four-Step Reduced Mechanism for Syngas Combustion,” Combust. Flame, 158(6), pp. 1059–1063. [CrossRef]
Saxena, P. , and Williams, F. , 2006, “ Testing a Small Detailed Chemical-Kinetic Mechanism for the Combustion of Hydrogen and Carbon Monoxide,” Combust. Flame, 145(1), pp. 316–323. [CrossRef]
Barlow, R. , Fiechtner, G. , Carter, C. , and Chen, J. , 2000, “ Experiments on the Scalar Structure of Turbulent CO/H2/N2 Jet Flames,” Combust. Flame, 120(4), pp. 549–569. [CrossRef]
Zhang, H. , Zhang, X. , and Zhu, M. , 2012, “ Experimental Investigation of Thermoacoustic Instabilities for a Model Combustor With Varying Fuel Components,” ASME J. Eng. Gas Turbines Power, 134(3), p. 031504. [CrossRef]
Biagioli, F. , and Güthe, F. , 2007, “ Effect of Pressure and Fuel–Air Unmixedness on NOx Emissions From Industrial Gas Turbine Burners,” Combust. Flame, 151(1), pp. 274–288. [CrossRef]
Bilger, R. , Stárner, S. , and Kee, R. , 1990, “ On Reduced Mechanisms for Methaneair Combustion in Nonpremixed Flames,” Combust. Flame, 80(2), pp. 135–149. [CrossRef]
Sánchez, A. , and Williams, F. , 2014, “ Recent Advances in Understanding of Flammability Characteristics of Hydrogen,” Prog. Energy Combust. Sci., 41, pp. 1–55. [CrossRef]
Libby, P. , and Williams, F. , 1980, Turbulent Reacting Flows, Vol. 1, Springer, Berlin.

Figures

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Fig. 1

Diagram of the numerical scheme

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Fig. 2

The instantaneous distribution of the OH radical and axial velocity of flame chnB

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Fig. 3

Comparison of the flame temperatures and scalar mass fractions at different axial locations (left: x/D = 20, middle: x/D = 30, and right: x/D = 40) between the experiment and LES computation with a reduced chemical mechanism

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Fig. 4

Experimental combustor and computational mesh: (a) combustor, (b) computational mesh, and (c) nozzle

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Fig. 5

Axial distribution characteristics of P(U) with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 6

Radial distribution characteristics of P(U) with different H2 contents at the axial location x/D = 0.917: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 7

Isosurface of vorticity (Ω=3000/s) with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 8

Modified flame index distribution with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 9

Contour plots of time-averaged temperature with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 10

Central recirculation zone structures with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 11

Effects of preferential diffusion on the superadiabatic phenomenon of syngas combustion around the nozzle outlet with LES–LEM method: (a) unity Lewis number and (b) nonunity Lewis number

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Fig. 12

Scattered temperature distribution in the mixture fraction space with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 13

OH distribution in the dimension of Z with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 14

H2O mass distribution in the dimension of Z with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 15

CO mass distribution in the dimension of Z with different H2 contents: (a) H2:CO = 1:3, (b) H2:CO = 1:1, and (c) H2:CO = 1:0.67

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Fig. 16

Distribution of F in the dimension of the progress variable with different models: (a) EDC model and (b) LEM model

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