Measurements of laminar burning velocities and Markstein lengths for methanol-air-nitrogen mixtures at elevated pressures and temperatures

Zhiyuan Zhang, Zuohua Huang, Xiangang Wang, Jun Xiang, Xibin Wang, Haiyan Miao

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96 Citations (Scopus)

Abstract

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 influences of these parameters on the laminar burning velocity and Markstein length were analyzed. 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 rate. The reasons for the cellular structure development are also analyzed.

Original languageEnglish
Pages (from-to)358-368
Number of pages11
JournalCombustion and Flame
Volume155
Issue number3
Early online date31 Jul 2008
DOIs
Publication statusPublished - 1 Nov 2008
Externally publishedYes

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