TY - JOUR
T1 - Effect of initial pressure on laminar combustion characteristics of hydrogen enriched natural gas
AU - Miao, Haiyan
AU - Jiao, Qi
AU - Huang, Zuohua
AU - Jiang, Deming
PY - 2008/7
Y1 - 2008/7
N2 - 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.
AB - 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.
KW - Constant volume combustion bomb
KW - Flame stability
KW - Hydrogen
KW - Laminar burning velocity
KW - Natural gas
UR - https://www.scopus.com/pages/publications/47649120381
U2 - 10.1016/j.ijhydene.2008.04.029
DO - 10.1016/j.ijhydene.2008.04.029
M3 - 文章
AN - SCOPUS:47649120381
SN - 0360-3199
VL - 33
SP - 3876
EP - 3885
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 14
ER -
