Citation

Shang R, Yang Y, Gao J, Li G. China Saf. Sci. J. 2019; 29(11): 103-108.

Copyright

(Copyright © 2019, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2019.11.017

PMID

unavailable

Abstract

To obtain the accurate measurement of laminar flame speed of H2 / CH4 / air mixtures, the laminar flame speeds were experimentally studied using Bunsen burner method incorporating two picture techniques of schlieren system and visible natural light system. According to the chemical dynamics mechanism, the laminar flame propagation characteristics of premixed fuel with different hydrogen fractions were simulated and calculated in order to investigate the influence of hydrogen fractions on the laminar premixed flame of H2 / CH4 / air mixtures. The results show that the method-independent laminar flame speeds of H2 / CH4 / air mixtures obtained by schlieren system are more equivalent to the laminar flame speed defined by the theory of combustion, that both the laminar flame speed and adiabatic flame temperature of H2 / CH4 / air mixtures increase with the growth of hydrogen fractions, that the equivalence ratio with the peak flame speed moves to the fuel-rich side by means of addition of hydrogen, and that with the continuous increase of hydrogen fractions, the mole fractions of vital radical H and the formation rate of OH radical rise significantly. © 2019 Ｃｈｉｎａ Ｓａｆｅｔｙ Ｓｃｉｅｎｃｅ Ｊｏｕｒｎａｌ. All rights reserved.

Language: zh