Experimental and numerical investigation on combustion characteristics of premixed hydrogen/air flame in a micro-combustor with a bluff body

Jianlong Wan, Aiwu Fan, Kaoru Maruta, Hong Yao, Wei Liu

Research output: Contribution to journalArticle

140 Citations (Scopus)

Abstract

Combustion characteristics of lean hydrogen/air mixture in a planar micro-channel with a bluff body were investigated experimentally and numerically. Effects of the inlet velocity and equivalence ratio on the blow-off limit, combustion efficiency and exhaust gas temperature were examined. The results show that the blow-off limit is greatly extended as compared with that of the micro-combustor without a bluff body. Moreover, the blow-off limit increases as the equivalence ratio is increased from 0.4 to 0.6. Furthermore, with the increase of inlet velocity, the flame front is prolonged and becomes narrower, and the high temperature segment of outer wall shifts downstream. In addition, the combustion efficiency and exhaust gas temperature increase first and then decrease with the increase of the inlet velocity. Finally, comparatively high combustion efficiency can be maintained over the whole combustible velocity range at a moderate equivalence ratio.

Original languageEnglish
Pages (from-to)19190-19197
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number24
DOIs
Publication statusPublished - 2012 Dec 1

Keywords

  • Blow-off limit
  • Bluff body
  • Combustion efficiency
  • Exhaust gas temperature
  • Micro-combustor

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Experimental and numerical investigation on combustion characteristics of premixed hydrogen/air flame in a micro-combustor with a bluff body'. Together they form a unique fingerprint.

  • Cite this