TY - GEN
T1 - Combined effects of stretch, curvature, and radiation on the extinction of tubular premixed flames
AU - Chen, Zheng
AU - Ju, Yiguang
PY - 2007
Y1 - 2007
N2 - The combined effects of flame stretch, curvature, and radiation on the extinction of premixed tubular flames are investigated using the large-activation-energy asymptotic analysis. A general theoretical correlation for flame radius, speed, and temperature is obtained and used to study the combined effects on the flame extinction limit. The flame isola for radiative tubular flames is predicted and it is found that both extinction limits are strongly affected by flame curvature. By varying the radiation intensity, various flame bifurcations are predicted and curvature effects are examined. It is shown that the extinction limits can be greatly changed by the change of flame curvature. Furthermore, the effects of Lewis number are examined. The results demonstrate a significant influence of preferential diffusion on the extinction limits of tubular flames at different curvatures.
AB - The combined effects of flame stretch, curvature, and radiation on the extinction of premixed tubular flames are investigated using the large-activation-energy asymptotic analysis. A general theoretical correlation for flame radius, speed, and temperature is obtained and used to study the combined effects on the flame extinction limit. The flame isola for radiative tubular flames is predicted and it is found that both extinction limits are strongly affected by flame curvature. By varying the radiation intensity, various flame bifurcations are predicted and curvature effects are examined. It is shown that the extinction limits can be greatly changed by the change of flame curvature. Furthermore, the effects of Lewis number are examined. The results demonstrate a significant influence of preferential diffusion on the extinction limits of tubular flames at different curvatures.
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U2 - 10.2514/6.2007-175
DO - 10.2514/6.2007-175
M3 - Conference contribution
AN - SCOPUS:34250845981
SN - 1563478900
SN - 9781563478901
T3 - Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
SP - 2074
EP - 2081
BT - Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - 45th AIAA Aerospace Sciences Meeting 2007
Y2 - 8 January 2007 through 11 January 2007
ER -