Journal
COMBUSTION AND FLAME
Volume 155, Issue 3, Pages 358-368Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.combustflame.2008.07.005
Keywords
Methanol; Laminar burning velocity; Markstein length; Flame stability
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Funding
- National Natural Science Foundation of China [50576070, 50521604]
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The laminar burning velocities and Markstein lengths for the methanol-air mixtures were measured at different equivalence ratios, elevated initial pressures and temperatures, and dilution ratios by using a constant volume combustion chamber and high-speed schlieren photography system. The results show that the laminar burning velocity of the methanol-air mixture decreases with an increase in initial pressure and increases with an increase in initial temperature. The Markstein length decreases with an increase in initial pressure and initial temperature, and increases with an increase in the dilution ratio. A cellular flame structure is observed at an early stage of flame propagation. The transition point is identified on the curve of flame propagation speed against stretch against stretch rate. The reasons for the cellular structure development are also analyzed.
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