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The flame structure and combustion dynamics in micro-mixing combustion of hydrogen-rich syngas with air

Author

Listed:
  • Chen, Dengke
  • Qiu, Penghua
  • Liu, Chang
  • Wang, Wentong
  • Sun, Rui
  • Zhao, Yijun
  • Zhang, Linyao
  • Xing, Chang
  • Liu, Li

Abstract

Micro-mixing (MM) combustion technology demonstrates remarkable NOx reduction capability in gas turbines. As for hydrogen-rich syngas with typical heating value, the experimental studies are carried out at different equivalence ratio (φ) of 0.380, 0.403, 0.426, 0.450, 0.474 and 0.499 and different nozzle outlet mixture velocity (v) of 32, 43, 54,64 and 75 m/s. An in-depth discussions on flame structure, combustion dynamics, and pollutant emissions is conducted. The result shows that in the operation range, no flashback or combustion oscillation occurred in actual experiments of the combined MM nozzles. With the increase of φ or decrease of v, the overall OH signal intensity and the anchoring ability of the flames become stronger, the heat release rate and temperature distribution uniformity would be enhanced, the degree of flame fluctuation decreases. NO emission increases rapidly with the increase of φ, which is consistent with the generation characteristics of thermal type NO, but under test conditions, they are not higher than 15 μL/L at 15 %O2. The increase of v is beneficial for reducing NO emission, attributed to the shortened residence time of gas.

Suggested Citation

  • Chen, Dengke & Qiu, Penghua & Liu, Chang & Wang, Wentong & Sun, Rui & Zhao, Yijun & Zhang, Linyao & Xing, Chang & Liu, Li, 2025. "The flame structure and combustion dynamics in micro-mixing combustion of hydrogen-rich syngas with air," Energy, Elsevier, vol. 326(C).
    • Handle: RePEc:eee:energy:v:326:y:2025:i:c:s0360544225019243
    DOI: 10.1016/j.energy.2025.136282
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    References listed on IDEAS

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    1. Cormos, Calin-Cristian, 2012. "Integrated assessment of IGCC power generation technology with carbon capture and storage (CCS)," Energy, Elsevier, vol. 42(1), pages 434-445.
    2. Lyu, Yajin & Xing, Chang & Liu, Li & Peng, Jiangbo & Shen, Wenkai & Yu, Xin & Qiu, Penghua, 2022. "Study of turbulent flame characteristics of water vapor diluted hydrogen-air micro-mixing combustion," Renewable Energy, Elsevier, vol. 189(C), pages 1194-1205.
    3. Chen, Mengshi & Zhang, Linyao & Xing, Chang & Bao, Yangyang & Qiu, Penghua & Zhang, Wenda & Sun, Shaozeng & Zhao, Yijun, 2024. "Experimental and numerical simulation study of the effect of mixing on the characteristics of swirl/non-swirl micromix flames," Energy, Elsevier, vol. 307(C).
    4. Shen, Wenkai & Xing, Chang & Liu, Haiqing & Liu, Li & Hu, Qiming & Wu, Guohua & Yang, Yujia & Wu, Shaohua & Qiu, Penghua, 2022. "Exhaust gas recirculation effects on flame heat release rate distribution and dynamic characteristics in a micro gas turbine," Energy, Elsevier, vol. 249(C).
    5. Chen, Mengshi & Zhao, Yijun & Zhang, Linyao & Wang, Chenglong & Xing, Chang & Qiu, Penghua & Sun, Shaozeng, 2025. "Emissions and stability characteristics of syngas combustion with swirl and non-swirl micromix configurations," Energy, Elsevier, vol. 321(C).
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    1. Zhao, Yang & Zhu, Ximing & Wang, Lu & Gou, Jin & Yan, Shilin & Liu, Xiao & Tang, Sijie & Zhou, Weixing & Yu, Daren, 2025. "Study on the flame structure and combustion dynamics of ammonia swirl flame assisted by gliding arc plasma," Energy, Elsevier, vol. 340(C).

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