Effect of initial pressure on laminar combustion characteristics of hydrogen enriched natural gas

Haiyan Miao, Qi Jiao, Zuohua Huang, Deming Jiang

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

Flame propagation of premixed natural gas-hydrogen-air mixtures was studied in a constant volume combustion bomb. Laminar burning velocities and mass burning fluxes were obtained under various hydrogen fractions and equivalence ratios with various initial pressures, while flame stability and their influencing factors (Markstein length, density ratio and flame thickness) were obtained by analyzing the flame images at various hydrogen fractions, initial pressures and equivalence ratios. The results show that hydrogen fraction, initial pressure as well as equivalence ratio have combined influence on both unstretched laminar burning velocity and flame instability. Meanwhile, according to flame propagation pictures taken by the high speed camera, flame stability decreases with the increase of initial pressures; for given equivalence ratio and hydrogen fraction, flame thickness is more sensitive to the variation of the initial pressure than to that of the density ratio.

Original languageEnglish
Pages (from-to)3876-3885
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume33
Issue number14
Early online date16 Jun 2008
DOIs
Publication statusPublished - 1 Jul 2008
Externally publishedYes

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