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CO formation characteristics in a centrally staged swirl combustor

Author

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  • Jin, Yating
  • Cao, Junyuan
  • Liu, Yunpeng
  • Gao, Yi
  • Yan, Yingwen

Abstract

Based on a validated numerical simulation methodology, this study focused on a centrally staged swirl combustor to investigate the combustion flow field inside the chamber under typical operating conditions. The CO formation characteristics of each region in the combustor were analyzed. In terms of elementary reactions, this study analyzed crucial reaction pathways contributing to CO formation in distinct regions utilizing the eddy dissipation concept model. Results reveal the occurrence of CO formation in the flame front and its rapid oxidation to form CO2 in the post-flame zone. CO2 partially dissociates into CO at high temperatures. Furthermore, air film quenching substantially impacts CO formation and emission, and air film greatly affects CO oxidation more than its formation. Local cooling and dilution effects from the air film contribute to the freezing of CO oxidation reactions. Therefore, a substantial quantity of CO remains unreacted, leading to increased CO emissions at the combustion chamber outlet.

Suggested Citation

  • Jin, Yating & Cao, Junyuan & Liu, Yunpeng & Gao, Yi & Yan, Yingwen, 2024. "CO formation characteristics in a centrally staged swirl combustor," Energy, Elsevier, vol. 307(C).
    • Handle: RePEc:eee:energy:v:307:y:2024:i:c:s0360544224023405
    DOI: 10.1016/j.energy.2024.132566
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    References listed on IDEAS

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    1. Honzawa, Takafumi & Kai, Reo & Okada, Akiko & Valera-Medina, Agustin & Bowen, Philip J. & Kurose, Ryoichi, 2019. "Predictions of NO and CO emissions in ammonia/methane/air combustion by LES using a non-adiabatic flamelet generated manifold," Energy, Elsevier, vol. 186(C).
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    3. Pascal Gruhlke & Christian Beck & Bertram Janus & Andreas M. Kempf, 2020. "LES Analysis of CO Emissions from a High Pressure Siemens Gas Turbine Prototype Combustor at Part Load," Energies, MDPI, vol. 13(21), pages 1-17, November.
    4. He, Yizhuo & Zou, Chun & Song, Yu & Luo, Jianghui & Jia, Huiqiao & Chen, Wuzhong & Zheng, Junmei & Zheng, Chuguang, 2017. "Comparison of the characteristics and mechanism of CO formation in O2/N2, O2/CO2 and O2/H2O atmospheres," Energy, Elsevier, vol. 141(C), pages 1429-1438.
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