Experimental investigation of coal ignition in counterflow flames

Ning Wu, Yi Chen Zong, Shui Qing Li, Qiang Yao, C. K. Law

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A novel counterflow flame apparatus that can meet the requirement of heterogeneous combustion of pulverized coal particles was developed. A new micro-scale powder feeding system was developed based on the fundamental of deagglomeration by particle-wall impaction, achieving a perfect dispersion and stable feeding rate of coal particles in low carrier flows. With the advanced ICCD optical technology, the behavior of coal particles across the counterflow flame was observed. Results show that the particle heat rate can reach as high as 105 K/s, while flame temperature and particle residence time are the dominant factors that influence the ignition mechanism in the post-flame zone.

Original languageEnglish (US)
Pages (from-to)224-227
Number of pages4
JournalKung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
Volume36
Issue number1
StatePublished - Jan 1 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Keywords

  • Conterflow flame
  • Ignition
  • Particle feeder
  • Pulverized coal

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