TY - JOUR
T1 - Extinction Mechanism of Lean Premixed Flames in a Laminar Stagnation Point Flow
AU - Yahagi, Yuji
AU - Ueda, Toshihisa
AU - Mizomoto, Masahiko
PY - 1992
Y1 - 1992
N2 - Effects of heat loss and flame stretch on the lean-limit extinction of laminar premixed flames in a stagnation point flow have been studied experimentally. The bulk stretch rate was varied from 40 s-1 to 420 s-1 while the Lewis number (Le) was varied from 0.85 to 1.8. The extinction of the lean propane/air flame (Le>1) is mainly caused by the flame stretch. On the other hand, the extinction of lean methane/air and lean methane/CCVC flames (Le<1) is caused not only by flame stretch but also by heat loss, since the flame is intensified by the Lewis number effect. Therefore, heat loss is predominant in the case of the lean methane/CO2-O2 flame whose Lewis number is smaller than that of the lean methane/air flame.
AB - Effects of heat loss and flame stretch on the lean-limit extinction of laminar premixed flames in a stagnation point flow have been studied experimentally. The bulk stretch rate was varied from 40 s-1 to 420 s-1 while the Lewis number (Le) was varied from 0.85 to 1.8. The extinction of the lean propane/air flame (Le>1) is mainly caused by the flame stretch. On the other hand, the extinction of lean methane/air and lean methane/CCVC flames (Le<1) is caused not only by flame stretch but also by heat loss, since the flame is intensified by the Lewis number effect. Therefore, heat loss is predominant in the case of the lean methane/CO2-O2 flame whose Lewis number is smaller than that of the lean methane/air flame.
KW - Combustion Phenomena
KW - Extinction
KW - Flame Stretch
KW - Heat Loss
KW - Laminar Stagnation Point Flow
KW - Laser Tomography
KW - Premixed Combustion
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U2 - 10.1299/kikaib.58.2878
DO - 10.1299/kikaib.58.2878
M3 - Article
AN - SCOPUS:85007706748
SN - 0387-5016
VL - 58
SP - 2878
EP - 2883
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
IS - 553
ER -