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Investigation of Methane Oxy-Fuel Combustion in a Swirl-Stabilised Gas Turbine Model Combustor

Author

Listed:
  • Mao Li

    (Department of Energy Sciences, Lund University, Ole Römers väg 1, Lund SE-22100, Sweden)

  • Yiheng Tong

    (Department of Energy Sciences, Lund University, Ole Römers väg 1, Lund SE-22100, Sweden)

  • Marcus Thern

    (Department of Energy Sciences, Lund University, Ole Römers väg 1, Lund SE-22100, Sweden)

  • Jens Klingmann

    (Department of Energy Sciences, Lund University, Ole Römers väg 1, Lund SE-22100, Sweden)

Abstract

CO 2 has a strong impact on both operability and emission behaviours in gas turbine combustors. In the present study, an atmospheric, preheated, swirl-stabilised optical gas turbine model combustor rig was employed. The primary objectives were to analyse the influence of CO 2 on the fundamental characteristics of combustion, lean blowout (LBO) limits, CO emission and flame structures. CO 2 dilution effects were examined with three preheating temperatures (396.15, 431.15, and 466.15 K). The fundamental combustion characteristics were studied utilising chemical kinetic simulations. To study the influence of CO 2 on the operational range of the combustor, equivalence ratio (Ф) was varied from stoichiometric conditions to the LBO limits. CO emissions were measured at the exit of the combustor using a water-cooled probe over the entire operational range. The flame structures and locations were characterised by performing CH chemiluminescence imaging. The inverse Abel transformation was used to analyse the CH distribution on the axisymmetric plane of the combustor. Chemical kinetic modelling indicated that the CO 2 resulted in a lower reaction rate compared with the CH 4 /air flame. Fundamental combustion properties such as laminar flame speed, ignition delay time and blowout residence time were found to be affected by CO 2 . The experimental results revealed that CO 2 dilution resulted in a narrower operational range for the equivalence ratio. It was also found that CO 2 had a strong inhibiting effect on CO burnout, which led to a higher concentration of CO in the combustion exhaust. CH chemiluminescence showed that the CO 2 dilution did not have a significant impact on the flame structure.

Suggested Citation

  • Mao Li & Yiheng Tong & Marcus Thern & Jens Klingmann, 2017. "Investigation of Methane Oxy-Fuel Combustion in a Swirl-Stabilised Gas Turbine Model Combustor," Energies, MDPI, vol. 10(5), pages 1-16, May.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:5:p:648-:d:97917
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    References listed on IDEAS

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    1. Nemitallah, Medhat A. & Habib, Mohamed A., 2013. "Experimental and numerical investigations of an atmospheric diffusion oxy-combustion flame in a gas turbine model combustor," Applied Energy, Elsevier, vol. 111(C), pages 401-415.
    2. Hu, Xianzhong & Yu, Qingbo & Liu, Junxiang & Sun, Nan, 2014. "Investigation of laminar flame speeds of CH4/O2/CO2 mixtures at ordinary pressure and kinetic simulation," Energy, Elsevier, vol. 70(C), pages 626-634.
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    Cited by:

    1. Hussain, Muzafar & Abdelhafez, Ahmed & Nemitallah, Medhat A. & Araoye, Abdulrazaq A. & Ben-Mansour, Rached & Habib, Mohamed A., 2020. "A highly diluted oxy-fuel micromixer combustor with hydrogen enrichment for enhancing turndown in gas turbines," Applied Energy, Elsevier, vol. 279(C).
    2. Abdelhafez, Ahmed & Hussain, Muzafar & Nemitallah, Medhat A. & Habib, Mohamed A. & Ali, Asif, 2021. "Effects of jet diameter and spacing in a micromixer-like burner for clean oxy-fuel combustion in gas turbines," Energy, Elsevier, vol. 228(C).
    3. Furqan Tahir & Haider Ali & Ahmer A.B. Baloch & Yasir Jamil, 2019. "Performance Analysis of Air and Oxy-Fuel Laminar Combustion in a Porous Plate Reactor," Energies, MDPI, vol. 12(9), pages 1-16, May.
    4. Abdelhafez, Ahmed & Rashwan, Sherif S. & Nemitallah, Medhat A. & Habib, Mohamed A., 2018. "Stability map and shape of premixed CH4/O2/CO2 flames in a model gas-turbine combustor," Applied Energy, Elsevier, vol. 215(C), pages 63-74.
    5. Mao Li & Yiheng Tong & Jens Klingmann & Marcus Thern, 2017. "Impact of Vitiation on a Swirl-Stabilized and Premixed Methane Flame," Energies, MDPI, vol. 10(10), pages 1-16, October.

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