A comparison of the heat transfer behaviors of biogas-H2 diffusion and premixed flames

H. S. Zhen, Chun Wah Leung, Chun Shun Cheung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

38 Citations (Scopus)


An experimental study was conducted to investigate the influence of hydrogen addition on the heat transfer characteristics of a biogas (60%CH4-40%CO2) flame. Results show improved flame stability and higher flame temperature in the premixed flame upon hydrogen addition. Both temperature and burning speed are increased in 1.0 ≤ Φ ≤ 1.5. Comparison of the premixed and diffusion flames reveals that the former yields higher heat transfer than the latter, due to higher flame temperature and larger volume of hot gas in the premixed flame. The total heat transfer rates of the two flames show opposite trends with increasing level of hydrogen addition, which is explained by the different structures. In the premixed flame, the contact of large cool core with target plate configures the high-temperature flame zone to a radial location with larger distance from the stagnation point than that of the diffusion flame, contributing to its higher heat transfer rate.
Original languageEnglish
Pages (from-to)1137-1144
Number of pages8
JournalInternational Journal of Hydrogen Energy
Issue number2
Publication statusPublished - 13 Jan 2014


  • Biogas-hydrogen hybrid fuel
  • Diffusion flame
  • Flame impingement heat transfer
  • Premixed flame

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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