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On the Flow Structure and Dynamics of Methane and Syngas Lean Flames in a Model Gas-Turbine Combustor

Author

Listed:
  • Vladimir Dulin

    (Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
    Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia)

  • Leonid Chikishev

    (Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
    Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia)

  • Dmitriy Sharaborin

    (Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia)

  • Aleksei Lobasov

    (Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia)

  • Roman Tolstoguzov

    (Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
    Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia)

  • Zundi Liu

    (School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China)

  • Xiaoxiang Shi

    (School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China)

  • Yuyang Li

    (School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China)

  • Dmitriy Markovich

    (Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia)

Abstract

The present paper compares the flow structure and flame dynamics during combustion of methane and syngas in a model gas-turbine swirl burner. The burner is based on a design by Turbomeca. The fuel is supplied through injection holes between the swirler blades to provide well-premixed combustion, or fed as a central jet from the swirler’s centerbody to increase flame stability via a pilot flame. The measurements of flow structure and flame front are performed by using the stereo particle image velocimetry and OH planar laser-induced fluorescence methods. The measurements are performed for the atmospheric pressure without preheating and for 2 atm with the air preheated up to 500 K. The flow Reynolds numbers for the non-reacting flows at these two conditions are 1.5 × 10 3 and 1.0 × 10 3 , respectively. The flame dynamics are analyzed based on a high-speed OH* chemiluminescence imaging. It is found that the flame dynamics at elevated conditions are related with frequent events of flame lift-off and global extinction, followed by re-ignition. The analysis of flow structure via the proper orthogonal decomposition reveals the presence of two different types of coherent flow fluctuations, namely, longitudinal and transverse instability modes. The same procedure is applied to the chemiluminescence images for visualization of bulk movement of the flame front and similar spatial structures are observed. Thus, the longitudinal and transverse instability modes are found in all cases, but for the syngas at the elevated pressure and temperature the longitudinal mode is related to strong thermoacoustic fluctuations. Therefore, the present study demonstrates that a lean syngas flame can become unstable at elevated pressure and temperature conditions due to a greater flame propagation speed, which results in periodic events of flame flash-back, extinction and re-ignition. The reported data is also useful for the validation of numerical simulation codes for syngas flames.

Suggested Citation

  • Vladimir Dulin & Leonid Chikishev & Dmitriy Sharaborin & Aleksei Lobasov & Roman Tolstoguzov & Zundi Liu & Xiaoxiang Shi & Yuyang Li & Dmitriy Markovich, 2021. "On the Flow Structure and Dynamics of Methane and Syngas Lean Flames in a Model Gas-Turbine Combustor," Energies, MDPI, vol. 14(24), pages 1-20, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8267-:d:697829
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    References listed on IDEAS

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    1. Daniel Butcher & Adrian Spencer, 2021. "Analysis of Multi-Stream Fuel Injector Flow Using Zonal Proper Orthogonal Decomposition," Energies, MDPI, vol. 14(6), pages 1-19, March.
    2. Edward Canepa & Alessandro Nilberto, 2019. "Experimental Flame Front Characterisation in a Lean Premix Burner Operating with Syngas Simplified Model Fuel," Energies, MDPI, vol. 12(12), pages 1-19, June.
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    Cited by:

    1. Leonid M. Chikishev & Dmitriy K. Sharaborin & Aleksei S. Lobasov & Artem A. Dekterev & Roman V. Tolstoguzov & Vladimir M. Dulin & Dmitriy M. Markovich, 2022. "LES Simulation of a Model Gas-Turbine Lean Combustor: Impact of Coherent Flow Structures on the Temperature Field and Concentration of CO and NO," Energies, MDPI, vol. 15(12), pages 1-26, June.

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