Effect of H2addition on OH distribution of LPG/Air circumferential inverse diffusion flame

J. Miao, Chun Wah Leung, Chun Shun Cheung, Zuohua Huang, Wu Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)


Experiments were conducted to study the effects of H2, overall equivalence ratio, and airside oxygen concentration on the structure and reaction zone of an LPG circumferential inverse diffusion flame (CIDF) with various hydrogen additions. Planar laser-induced fluorescence (PLIF) technique was used to diagnose distribution and concentration of hydroxyl radical (OH) inside the flame. The result shows that hydrogen addition can significantly improve combustion of the LPG IDF. Although 100%H2IDF contains double flame structure, LPG-H2IDF seldom shows the structure even when H2percentage is as high as 90%. Under the low air jet velocity and high overall equivalence ratio condition, LPG IDF shows a large and intense reaction zone, which is similar to that found in a turbulent premixed flame. Oxygen enhancement on the oxidizer side could significantly improve the combustion without changing the overall equivalence ratio.
Original languageEnglish
Pages (from-to)9653-9663
Number of pages11
JournalInternational Journal of Hydrogen Energy
Issue number22
Publication statusPublished - 15 Jun 2016


  • Hydrogen
  • Inverse diffusion flame
  • LPG

ASJC Scopus subject areas

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


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