Experimental study of propane/air premixed flame dynamics with hydrogen addition in a meso-scale quartz tube

Wei Wang, Zhengxing Zuo*, Jinxiang Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The combustion process of propane/air premixed flame in meso-scale quartz tubes with different hydrogen additions was investigated experimentally to explain the flame-wall interaction mechanism. The ranges of different flame regimes were obtained by changing the flow rates of propane and hydrogen. The effects of hydrogen addition, inlet velocity and equivalence ratio were analyzed. The results show that the hydrogen addition broadens the operation ranges of fast flame regime and slow flame regime significantly. The flame propagation speed is in the same order of the thermal wave speed in solid wall for the slow flames. In fast flame regime, the flame propagation speed has an inverse correlation with the inlet flow velocity irrespective of the equivalence ratio. With the increase of the equivalence ratio, the maximum flame speed in fast flame regime decreases gradually, while the maximum flame speed in slow flame regime increases continually. It indicates that rich fuel condition suppresses the fast flame and promotes the slow flame. In slow flame regime, the output thermal efficiency is dominated by the inlet velocity and equivalence ratio.

Original languageEnglish
Pages (from-to)1690-1696
Number of pages7
JournalJournal of the Energy Institute
Volume93
Issue number4
DOIs
Publication statusPublished - Aug 2020

Keywords

  • Flame-wall coupling
  • Hydrogen addition
  • Meso-scale combustion
  • Propane/air premixed flame

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Wang, W., Zuo, Z., & Liu, J. (2020). Experimental study of propane/air premixed flame dynamics with hydrogen addition in a meso-scale quartz tube. Journal of the Energy Institute, 93(4), 1690-1696. https://doi.org/10.1016/j.joei.2020.02.006