Effects of hydrocarbon addition on cellular instabilities in expanding syngas-air spherical premixed flames

Tran Mann Vu, Won Sik Song, Jeong Park, Oh Boong Kwon, Dae Seok Bae, Jin Han Yun, Sang In Keel

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Experiments were conducted in a constant-pressure combustion chamber to investigate the effects of hydrocarbon addition on cellular instabilities of syngas-air flames. The measured laminar burning velocities were compared with the predicted results computed using reliable kinetic mechanisms with detailed transport and chemistry. The cellular instabilities that included hydrodynamic and diffusional-thermal instabilities of the hydrocarbon-added syngas-air flames were identified and evaluated. Further, experimentally measured critical Peclet numbers for fuel-lean flames were compared with the predicted results. Experimental results showed that the laminar burning velocities decreased significantly with an increase in the amount of hydrocarbon added in the reactant mixtures. With addition of propane and butane, the propensity for cell formation was significantly diminished whereas the cellular instabilities for methane-added syngas-air flames were not suppressed.

Original languageEnglish
Pages (from-to)179-188
Number of pages10
JournalTransactions of the Korean Society of Mechanical Engineers, B
Issue number2
Publication statusPublished - Feb 2011
Externally publishedYes


  • Cells formation
  • Effective lewis number
  • Flame instability
  • H/co syngas
  • Premixed combustion

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