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Optimized Design of a Swirler for a Combustion Chamber of Non-Premixed Flame Using Genetic Algorithms

Author

Listed:
  • Daniel Alejandro Zavaleta-Luna

    (Master in Applied Engineering, Veracruzana University, 94294 Veracruz, Mexico)

  • Marco Osvaldo Vigueras-Zúñiga

    (Master in Applied Engineering, Veracruzana University, 94294 Veracruz, Mexico
    Mechanical Engineering Department, Veracruzana University, 94294 Veracruz, Mexico)

  • Agustín L. Herrera-May

    (Master in Applied Engineering, Veracruzana University, 94294 Veracruz, Mexico
    Micro and Nanotechnology Research Center, Veracruzana University, 94294 Veracruz, Mexico)

  • Sergio Aurelio Zamora-Castro

    (Master in Applied Engineering, Veracruzana University, 94294 Veracruz, Mexico)

  • María Elena Tejeda-del-Cueto

    (Master in Applied Engineering, Veracruzana University, 94294 Veracruz, Mexico
    Mechanical Engineering Department, Veracruzana University, 94294 Veracruz, Mexico)

Abstract

Recirculation in a combustion chamber is required for stabilizing the flame and reducing pollutants. The swirlers can generate recirculation in a combustion chamber, inducing a swirling flow that breaks vorticity and improves the mixing of air and fuel. The swirl number ( S n ) is related to the formation of recirculation in conditions of high-intensity flows with S n > 0.6. Thus, the optimized design of a swirler is necessary to generate enough turbulence that keeps the flame stable. We present the optimized design of a swirler considering the main parameters for a non-premixed combustion chamber. This optimization is made with genetic algorithms to ensure the generation of a recirculation zone in the combustion chamber. This recirculation phenomenon is simulated using computational fluid dynamics (CFD) models and applying the renormalization group (RNG) k-ε turbulence method. The chemistry is parameterized as a function of the mixture fraction and dissipation rate. A CFD comparison of a baseline swirler model and the proposed optimized swirler model shows that a recirculation zone with high intensity and longer length is generated in the primary zone of the combustion chamber when the optimized model is used. Furthermore, the CFD models depict swirling effects in the turbulent non-premixed flame, in which the stabilization is sensitive to the recirculation zone. The temperature results obtained with the CFD models agree well with the experimental results. The proposed design can help designers enhance the performance of combustion chambers and decrease the generation of CO and NO x .

Suggested Citation

  • Daniel Alejandro Zavaleta-Luna & Marco Osvaldo Vigueras-Zúñiga & Agustín L. Herrera-May & Sergio Aurelio Zamora-Castro & María Elena Tejeda-del-Cueto, 2020. "Optimized Design of a Swirler for a Combustion Chamber of Non-Premixed Flame Using Genetic Algorithms," Energies, MDPI, vol. 13(9), pages 1-25, May.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:9:p:2240-:d:353657
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    References listed on IDEAS

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    1. Liu, Jie & Wang, Junle & Zhao, Hongbo, 2018. "Optimization of the injection parameters and combustion chamber geometries of a diesel/natural gas RCCI engine," Energy, Elsevier, vol. 164(C), pages 837-852.
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    Cited by:

    1. Marco Osvaldo Vigueras-Zúñiga & Carlos Augusto Ramírez-Ruíz & Agustín L. Herrera-May & María Elena Tejeda-del-Cueto, 2021. "Numerical and Experimental Analysis of the Effect of a Swirler with a High Swirl Number in a Biogas Combustor," Energies, MDPI, vol. 14(10), pages 1-21, May.

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