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Phenomenological characteristics of hydrogen/air premixed flame propagation in closed rectangular channels

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  • Shen, Xiaobo
  • Xu, Jiaying
  • Wen, Jennifer X.

Abstract

The propagation of hydrogen/air premixed flame in channels were investigated, giving particular focus on the effect of aspect ratio through both experimental and numerical investigations. The schlieren system and pressure sensor were used to capture flame shapes and pressure changes, respectively in a channel with aspect ratio of 12. The phenomena of flame shape evolutions, including classic tulip inversion, featured T-shape flame, elongated tulip flame and tulip distortion captured in the experiments, were well reproduced by the numerical simulation. The predicted flame front speed, pressure build-up and their fluctuations are also in reasonably good agreement with the measurements. The validated numerical modelling approach was then applied to investigate the effect of channel aspect ratio on flame shape change, flame propagation and overpressure dynamics. It was found that with increasing aspect ratio, the flame shape changes become more vigorous accompanied by the amplified flame and pressured dynamics due to the enhanced pressure waves, flame-pressure wave interaction and flame instability. The Bychkov's analytical model was used to give predictions on the characteristic times of flame deformation in the channels. By comparison, the analytical model performs better for channel with lower aspect ratio.

Suggested Citation

  • Shen, Xiaobo & Xu, Jiaying & Wen, Jennifer X., 2021. "Phenomenological characteristics of hydrogen/air premixed flame propagation in closed rectangular channels," Renewable Energy, Elsevier, vol. 174(C), pages 606-615.
    • Handle: RePEc:eee:renene:v:174:y:2021:i:c:p:606-615
    DOI: 10.1016/j.renene.2021.04.056
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    References listed on IDEAS

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    1. Shen, Xiaobo & Zhang, Chao & Xiu, Guangli & Zhu, Hongya, 2019. "Evolution of premixed stoichiometric hydrogen/air flame in a closed duct," Energy, Elsevier, vol. 176(C), pages 265-271.
    2. Xiao, Huahua & Duan, Qiangling & Sun, Jinhua, 2018. "Premixed flame propagation in hydrogen explosions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P2), pages 1988-2001.
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    Cited by:

    1. Dou, Zengguo & Shen, Xiaobo & Zhang, Zhenwu & Zhou, Feng & Ma, Yunsheng & Zou, Xiong & Liu, Haifeng & Wang, Fuchen, 2023. "Effects of aspect ratio and initial pressure on asymmetric flame and flame instability of premixed CO/air," Energy, Elsevier, vol. 278(PA).
    2. Jiang, Yiming & Pan, Xuhai & Cai, Qiong & Wang, Zhilei & Klymenko, Oleksiy V. & Hua, Min & Wang, Qingyuan & Zhang, Tao & Li, Yunyu & Jiang, Juncheng, 2022. "Physics and flame morphology of supersonic spontaneously combusting hydrogen spouting into air," Renewable Energy, Elsevier, vol. 196(C), pages 959-972.
    3. Jiajia Liu & Danyang Yu & Ping Li & Xuxu Sun & Xianfeng Chen, 2023. "Characteristics of Explosion Hazards in Methane–Air Mixtures Diluted by Hydrogen," Energies, MDPI, vol. 16(18), pages 1-14, September.
    4. Shen, Xiaobo & Zhang, Zhenwu & Dou, Zengguo & Cong, Beihua & Xiao, Qiuping & Liu, Haifeng, 2022. "Premixed syngas/air combustion in closed ducts with varied aspect ratios and initial pressures," Energy, Elsevier, vol. 254(PC).
    5. Shen, Xiaobo & Zhang, Zhenwu & Dou, Zengguo & Zhang, Chao, 2021. "Premixed CO/air combustion in a closed duct with inhibition," Energy, Elsevier, vol. 230(C).

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