Effect of Swirl Number on the Combustion Characteristic of Syngas using FGM Model Simulation

  • Authors

    • N. Samiran
    • M. N. M. Jaafar
    • C. T. Chong
    • N. N. M. Hassan
    • A. L. M. Tobi
    2019-12-24
    https://doi.org/10.14419/ijet.v7i4.14.27563
  • CFD, FGM, Premixed swirl, Swirl number, Syngas

  • Abstract

    Synthesis gas (syngas) is one of the potential alternative clean fuel energy in gas-fired boilers swirl burners system. Computational Fluid Dynamic (CFD) simulations were conducted to study the effect of different swirl number on the combustion characteristics of CO-rich syngas in premixed swirl mode using a model boiler swirl burner. The composition of CO-rich syngas is 67.5 % CO, 22.5 % H2, 5 % CO2 and 5 % CH4. Two types of combustion model for simulation analysis were used in this study namely flamelet generated manifold (FGM) and chemical equilibrium (CE) approaches. The CFD results were validated with actual experimental data with the same swirl number. The FGM method shows better agreement with experimental result, hence adopted to model and predict the CO-rich syngas flame characteristic in the reaction zones. The CO-rich syngas was then numerically tested on different type of swirl number including 0.39, 0.59, 0.84, 1.20 and 1.80. Result shows that the angle of flame distribution was apparently equivalence with the vane angle swirler. Swirler with a higher swirl number (1.20 and 1.80) showed lower NO (57%) and lower CO (98%) species compared to the one with a lower swirler number (0.39 – 0.84). Flame with lower swirl number (0.39) exhibited higher temperature, OH and O radical content. Thus, it contribute to the high production of NO and CO species.

     

     

  • References

    1. [1] Lee, MC, Seo, SB, Yoon, J, Kim, M, and Yoon, Y. (2012) Experimental study on the effect of N2, CO2, and steam dilution on the combustion performance of H2 and CO synthetic gas in an industrial gas turbine. Fuel 102: 431-38.

      [2] Burbano, HJ, Pareja, J, and Amell, AA. (2011) laminar burning velocities and flame stability analysis of H2/CO/air mixtures with dilution of N2 and CO2. Int. J. Hydrogen Energy 36(4): 3232-42.

      [3] Boivin, P, Jiménez, C, Sánchez, AL, and Williams, FA. (2011) A four-step reduced mechanism for syngas combustion. Combust. Flame 158(6): 1059-63.

      [4] Ranga Dinesh, KKJ, Luo, KH, Kirkpatrick, MP, and Malalasekera, (2013) W. Burning syngas in a high swirl burner: Effects of fuel composition. Int. J. Hydrogen Energy 38(21): 9028-42.

      [5] Azimov, U, Tomita, E, Kawahara, N, and Harada, (2011) Y. Effect of syngas composition on combustion and exhaust emission characteristics in a pilot-ignited dual-fuel engine operated in PREMIER combustion mode. Int. J. Hydrogen Energy 36(18): 11985-96.

      [6] Mansouri, Z, Aouissi, M, and Boushaki, T. (2016) Numerical computations of premixed propane flame in a swirl-stabilized burner: Effects of hydrogen enrichment, swirl number and equivalence ratio on flame characteristics. Int. J. Hydrogen Energy 41(22): 9664-78.

      [7] Tunçer, O, Kaynaroğlu, B, Karakaya, MC, Kahraman, S, Çetiner-Yıldırım, O, and Baytaş, C. (2014) Preliminary investigation of a swirl stabilized premixed combustor. Fuel 115: 870-74.

      [8] Ding, N, Arora, R, Norconk, M, and Lee, S-Y. (2011) Numerical investigation of diluent influence on flame extinction limits and emission characteristic of lean-premixed H2–CO (syngas) flames. Int. J. Hydrogen Energy 36(4): 3222-31.

      [9] De, A and Acharya, S. (2012) parametric study of upstream flame propagation in hydrogen-enriched premixed combustion: Effects of swirl, geometry and premixedness. Int. J. Hydrogen Energy 37(19): 14649-68.

      [10] Ranga Dinesh, KKJ, Jiang, X, and van Oijen, JA. (2012) Numerical simulation of hydrogen impinging jet flame using flamelet generated manifold reduction. Int. J. Hydrogen Energy 37(5): 4502-15.

      [11] Mukhopadhyay, S, Bastiaans, RJM, Oijen, JAv, and Goey, LPHd. (2015) Analysis of a filtered flamelet approach for coarse DNS of premixed turbulent combustion. Fuel 144: 388–99.

      [12] Nakod, P, Yadav, R, Rajeshirke, P, and Orsino, S. (2014) A Comparative Computational Fluid Dynamics Study on Flamelet-Generated Manifold and Steady Laminar Flamelet Modeling for Turbulent Flames. J. Eng. Gas Turbines Power 136(8): 081504.

      [13] Nguyen, P-D, Vervisch, L, Subramanian, V, and Domingo, P. (2009) Multidimensional flamelet-generated manifolds for partially premixed combustion. Combust. Flame 157(1): 43-61.

      [14] Donini, A, Bastiaans, RJM, van Oijen, JA, and de Goey, LPH. (2015) Differential diffusion effects inclusion with flamelet generated manifold for the modeling of stratified premixed cooled flames. Proc. Combust. Inst. 35(1): 831-37.

      [15] Verhoeven, LM, Ramaekers, WJS, van Oijen, JA, and de Goey, LPH. (2012) Modeling non-premixed laminar co-flow flames using flamelet-generated manifolds. Combust. Flame 159(1): 230-41.

      [16] Atoof, H and Emami, MD. (2016) Numerical simulation of laminar premixed CH4/air flame by flamelet-generated manifolds: A sensitivity analysis on the effects of progress variables. J. Taiwan Inst. Chem. Eng. 60: 287-93.

      [17] Nakod, P, Yadav, R, Rajeshirke, P, and Orsino, S. A (2014) Comparative Computational Fluid Dynamics Study on Flamelet-Generated Manifold and Steady Laminar Flamelet Modeling for Turbulent Flames. J. Eng. Gas Turbines Power 136(8): 081504.

      [18] Samiran, N.A., Ng, J., Mohd Jaafar, M.A., Valera-Medina, A., Chong, C.T., (2016) H2-rich syngas strategy to reduce NOx and CO emissions and improve stability limits under premixed swirl combustion mode. Int. J. Hydrogen Energy 41, 19243–19255.

      [19] Samiran, N.A., Ng, J., Mohd Jaafar, M.A., Valera-Medina, A., Chong, C.T., (2017) Swirl stability and emission characteristics of CO-enriched syngas/air flame in a premixed swirl burner Process Saf. Environ. Prot. 112, 315-326.

      [20] Turkeli-Ramadan, Z, Sharma, RN, and Raine, RR. (2015) Two-dimensional simulation of premixed laminar flame at microscale. Chem. Eng. Sci. 138: 414-31.

      [21] Krieger, GC, Campos, APV, Takehara, MDB, Cunha, FAd, and Veras, CAG. (2015) Numerical simulation of oxy-fuel combustion for gas turbine applications. Appl. Therm. Eng. 78: 471 - 81.

      [22] Mayr, B, Prieler, R, Demuth, M, Potesser, M, and Hochenauer, C. (2015) CFD and experimental analysis of a 115kW natural gas fired lab-scale furnace under oxy-fuel and air–fuel conditions. Fuel 159: 864-75.

      [23] ANSYS Fluent Theory Guide. (2013).

      [24] Mayr, B, Prieler, R, Demuth, M, and Hochenauer, C. (2015) The usability and limits of the steady flamelet approach in oxy-fuel combustions. Energy 90: 1478-89.

  • Downloads

  • How to Cite

    Samiran, N., N. M. Jaafar, M., T. Chong, C., N. M. Hassan, N., & L. M. Tobi, A. (2019). Effect of Swirl Number on the Combustion Characteristic of Syngas using FGM Model Simulation. International Journal of Engineering & Technology, 7(4.14), 200-205. https://doi.org/10.14419/ijet.v7i4.14.27563

    Received date: 2019-02-19

    Accepted date: 2019-02-19

    Published date: 2019-12-24