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Flame stability and propagation characteristics for combustion in air for an equimolar mixture of hydrogen and carbon monoxide in turbulent conditions

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  • Li, Hong-Meng
  • Li, Guo-Xiu
  • Jiang, Yan-Huan
  • Li, Lei
  • Li, Fu-Sheng

Abstract

In this study, the influence of turbulence intensity on flame local structural and local propagation characteristics was studied. In order to achieve this, 50% H2/50% CO with equivalence ratio of 0.8 were conducted under different turbulence intensities ranging from 0 to 1.31 m/s at atmospheric pressure and temperature. The distribution of the flame local radius and flame local propagation speed and the correlation between the two were investigated. The results show that the turbulence can increase the disturbance in the flame front, and enhance the fluctuation of the flame local radius, resulting in an increase in the fluctuation of the flame local propagation speed. With the development of flame, the distribution of the flame local propagation speed tended to become uniform, while the intersection zone of the flame local propagation speed and the flame local radius distribution gradually decreased. When the turbulence intensity ranged between 0.49 m/s to 0.74 m/s and between 1.08 m/s to 1.31 m/s, the sensitivity of the flame local propagation speed to its local characteristics reduced with the increase of the turbulence intensity.

Suggested Citation

  • Li, Hong-Meng & Li, Guo-Xiu & Jiang, Yan-Huan & Li, Lei & Li, Fu-Sheng, 2018. "Flame stability and propagation characteristics for combustion in air for an equimolar mixture of hydrogen and carbon monoxide in turbulent conditions," Energy, Elsevier, vol. 157(C), pages 76-86.
  • Handle: RePEc:eee:energy:v:157:y:2018:i:c:p:76-86
    DOI: 10.1016/j.energy.2018.05.101
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    1. Sun, Z.Y. & LIU, Shao-Yan, 2022. "A comparative study on the turbulent explosion characteristics of syngas between CO-enriched and H2-enriched," Energy, Elsevier, vol. 241(C).
    2. Zhao, Haoran & Wang, Jinhua & Cai, Xiao & Dai, Hongchao & Liu, Xiao & Li, Gang & Huang, Zuohua, 2023. "On accelerative propagation of premixed hydrogen/air laminar and turbulent expanding flames," Energy, Elsevier, vol. 283(C).
    3. Shilong, Zhao & Yuxin, Fan, 2020. "Experimental and numerical study on fuel distribution and flame expansion of the enhanced flame holding devices," Energy, Elsevier, vol. 203(C).
    4. Li, Ruikang & Luo, Zhenmin & Wang, Tao & Cheng, Fangming & Lin, Haifei & Zhu, Xiaochun, 2020. "Effect of initial temperature and H2 addition on explosion characteristics of H2-poor/CH4/air mixtures," Energy, Elsevier, vol. 213(C).
    5. Zhao, Deyang & An, Yanzhao & Pei, Yiqiang & Shi, Hao & Wang, Kun, 2023. "Numerical study on the asymmetrical jets formation from active pre-chamber under super-lean combustion conditions," Energy, Elsevier, vol. 262(PA).
    6. Huang, Sheng & Zhang, Yu & Huang, Ronghua & Xu, Shijie & Ma, Yinjie & Wang, Zhaowen & Zhang, Xinhua, 2019. "Quantitative characterization of crack and cell's morphological evolution in premixed expanding spherical flames," Energy, Elsevier, vol. 171(C), pages 161-169.
    7. Cai, Peng & Liu, Zhenyi & Li, Mingzhi & Zhao, Yao & Li, Pengliang & Li, Shuhong & Li, Yingke, 2022. "Experimental study of effect of equivalence ratio and initial turbulence on the explosion characteristics of LPG/DME clean blended fuel," Energy, Elsevier, vol. 250(C).
    8. 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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