Effect of reactant initial temperature on methane/oxygen diffusion flame stability in a furnace

Jeffrey D. Moore, Grant A. Risha, Kenneth K. Kuo, Mark D. D'Agostini

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


An investigation was performed to examine the initial temperature effect of gaseous reactants on the stability of a methane/oxygen diffusion flame for a constant oxidizer-to-fuel mass ratio ((O/F) mass )of 1.3 in a furnace. Gaseous reactants were individually heated and then ignited by an ethane/oxygen torch. Stability maps were developed based on data from over 130 combustion tests with initial reactant temperatures ranging from 298 to 398 K. As oxidizer initial temperature was increased, the Reynolds number and ignition time decreased, resulting in a quicker transition from a stable flame regime to an unstable flame regime. The diffusion flame standoff distance from the injector exit plane rose and fell as the oxidizer temperature was further increased. This indicates that for shorter ignition times and higher flow velocities associated with hotter reactants, diffusion flames achieved more efficient transverse mixing in the jet and thus minimized their instability associated with large standoff distances.

Original languageEnglish (US)
Pages (from-to)2069-2089
Number of pages21
JournalCombustion science and technology
Issue number11
StatePublished - Nov 2005

All Science Journal Classification (ASJC) codes

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


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