CFD Insight of the Flow Dynamics and Velocity Fields in a Gas Turbine Combustor with a Swirl Flame

Document Type: Full article

Author

Department of Chemical Engineering, Hamedan University of Technology, Hamedan, Iran

Abstract

The computational fluid dynamics (CFD) simulations of gas turbine combustor were performed for CH4/air flow with swirl flames. The flow dynamics and velocity fields were numerically studied and the results compared with the experimental data obtained by laser measurements. Two-dimensional (2D) and three-dimensional (3D) simulations were performed with consideration of a two-step oxy-combustion reaction kinetics model. The Eddy Dissipation Concept (EDC) combustion model was used in the numerical analysis. The numerical results obtained by EDC model were in good agreement with the experimental data. However, an error analysis showed that the simulated mean velocity components obtained by 3-D geometry were more consistent with the experimental data than those obtained by 2-D geometry.

Keywords


[1]        Guiberti, T. F., Durox, D., Scouflaire, P. and Schuller T., "Impact of heat l T. oss and hydrogen enrichment on the shape of confined swirling flames", P. Combust. Inst., 35 (2), 1385 (2015).

[2]        Day, M., Tachibana, Sh., Bell, J., Lijewski, M., Beckner, V. and Cheng, R, K., "A combined computational and experimental characterization of lean premixed turbulent low swirl laboratory flames II. Hydrogen flames", Combust. Flame, 162 (5), 2148 (2015).

[3]        Singh, S. and Chander, S., "Heat transfer characteristics of dual swirling flame impinging on a flat surface", Int. J. Thermal. Sci., 89 (1), 1 (2015).

[4]        González-Cencerrado, A., Gil, A. and Peña, B., "Characterization of PF flames under different swirl conditions based on visualization systems", Fuel, 113 (1), 798 (2013).

[6]        Birjandi, A. H. and Bibeau, E. L., "Improvement of Acoustic Doppler Velocimetry in bubbly flow measurements as applied to river characterization for kinetic turbines", Int. J. Multiphase. Flow., 37 (8), 919 (2011).

[7]        Ainsworth, R.W., Thorpe, S. J. and Manners, R. J., "A new approach to flow-field measurement—A view of Doppler global velocimetry techniques", Int. J. Heat. Fluid. Flow., 18 (1), 116 (1997).

[8]        Bulat, G., Fedina, E., Fureby, C., Meier, W. and Stopper, U., "Reacting flow in an industrial gas turbine combustor: LES and experimental analysis", P. Combust. Inst., 35 (3), 3175 (2015).

[9]        Krieger, G. C., Campos, A. P. V., Takehara, M. D. B., Alfaia da Cunha, F. and Gurgel Veras, C. A. "Numerical simulation of oxy-fuel combustion for gas turbine applications", Appl. Therm. Eng., 78 (1), 471 (2015).

[10]      Gobbato, P., Masi, M., Toffolo, A., Lazzaretto, A. and Tanzini, G., "Calculation of the flow field and NOx emissions of a gas turbine combustor by a coarse computational fluid dynamics model", Energy, 45 (1), 445 (2012).

[11]      Gicquel, L. Y. M., Staffelbach, G. and Poinsot, T. "Large Eddy Simulations of gaseous flames in gas turbine combustion chambers", Prog. Energ. Combust., 38 (6), 782 (2012).

[12]      Lee, J., Jeon, S., and Kim, Y., "Multi-environment probability density function approach for turbulent CH4/H2 flames under the MILD combustion condition", Combust. Flame, 162 (4), 1464 (2015).

[13]      Ganji, H. B. and Ebrahimi, R., "Numerical estimation of blowout, flashback, and flame position in MIT micro gas-turbine chamber", Chem. Eng. Sci., 104 (18), 857 (2013).

[14]      Prieler, R., Demuth, M., Spoljaric, D. and Hochenauer, Ch., "Evaluation of a steady flamelet approach for use in oxy-fuel combustion", Fuel, 118 (1), 55 (2014).

[15]      Magnussen, B. F. and Hjertager, B. H., "On mathematical modeling of turbulent combustion with special emphasis on soot formation and combustion", Symp. (Int.) Combust., 16, (1) 719 (1977).

[16]      Stefanidis, G. D., Merci, B., Heynderickx, G. J. and Marin, G. B., "CFD simulations of steam cracking furnaces using detailed combustion mechanisms", Comput. Chem. Eng., 30 (4), 635 (2006).

[17]      Maghbouli, A., Khoshbakhti Saray, R., Shafee, S. and Ghafouri, J., "Numerical study of combustion and emission characteristics of dual-fuel engines using 3D-CFD models coupled with chemical kinetics", Fuel, 106 (1), 98 (2013).

 [18]     Lee, G. W., Shon, B .H. Yoo, J .G. Jung, J .H. and Oh, K .J., "The influence of mixing between NH3 and NO for a De-NOx reaction in the SNCR process", J. Ind. Eng. Chem., 14 (4), 457 (2008).

[19]      Di Benedetto, A., Di Sarli, V. and Russo, G., "Effect of geometry on the thermal behavior of catalytic micro-combustors", Catal. Today, 155 (1–2), 116 (2010).

[20]      Weigand, P., Meier, W., Duan X. R., Stricker, W. and Aigner, M., "Investigations of swirl flames in a gas turbine model combustor I. Flow field, structures, temperature, and species distributions", Combust. Flame, 144 (1), 205 (2006).

[21]      Ma, T., Gao, Y., Kempf, A. M. and Chakraborty, N., "Validation and implementation of algebraic LES modelling of scalar dissipation rate for reaction rate closure in turbulent premixed combustion", Combust. Flame, 161 (12), 3134 (2014).

[22]      Ertesvag, I. S. and Magnussen, B. F., "The eddy dissipation turbulence energy cascade model", Combust. Sci. Technol., 159 (1), 213 (2000).