Coal dust flame propagation in a laboratory flammability tube

Scott E. Slezak, Dennis J. Fitch, Herman Krier, Richard O. Buckius

Research output: Contribution to journalArticlepeer-review


Coal dust flammability experiments are essential in order to evaluate propagation limit concentrations and the fundamental burning velocity rate as a function of dust concentration. This paper presents such data for Pittsburgh seam bituminous coal dust using a relatively large scale horizontal flammability apparatus, the gravity tumbler flammability tube (GTFT). The reported lean limit (based on propagating a steady state constant pressure flame) was measured as 420 g/m3, a factor of two or three greater than that reported from the modified Hartmann bomb apparatus. A maximum steady state flame speed was measured as 34 cm/s, at a concentration of 900 g/m3, a value greater than that observed when using held flame facilities.

Original languageEnglish (US)
Pages (from-to)103-119
Number of pages17
JournalCombustion and Flame
Issue number1-3
StatePublished - Dec 1983

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • General Physics and Astronomy


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