TY - JOUR
T1 - Radiation extinction limit of counterflow premixed lean methane-air flames
AU - Guo, Hongsheng
AU - Ju, Yiguang
AU - Maruta, Kaoru
AU - Niioka, Takashi
AU - Liu, Fengshan
N1 - Funding Information:
The authors thank Mr. Atsutaka Honda for carrying out the supplementary experiments in normal gravity. This work was performed under the management of the Japan Space Utilization Promotion Center as part of the R & D project of Advanced Furnaces and Boilers supported by the NEDO (New Energy and Industrial Technology Development Organization).
PY - 1997/6
Y1 - 1997/6
N2 - The application of the laminar flamelet concept to turbulent flame modeling requires a detailed understanding of stretched laminar flames. In this study, we used numerical methods, including arc-length continuation, to simulate the extinction characteristics of counterflow premixed fuel-lean, methane air flames. Attention was primarily paid to the effect of radiative heat loss on the extinction characteristics of these flames. The results show that at medium to low values of the stretch rate, the radiative heat loss has a particularly strong impact on the counterflow premixed fuel-lean, methane- air flames. It was also found that, in addition to the stretch extinction limit at a high stretch rate, there exits a radiation extinction limit at a low stretch rate. Furthermore, the relationship between these two extinction limits and the equivalence ratio is obtained.
AB - The application of the laminar flamelet concept to turbulent flame modeling requires a detailed understanding of stretched laminar flames. In this study, we used numerical methods, including arc-length continuation, to simulate the extinction characteristics of counterflow premixed fuel-lean, methane air flames. Attention was primarily paid to the effect of radiative heat loss on the extinction characteristics of these flames. The results show that at medium to low values of the stretch rate, the radiative heat loss has a particularly strong impact on the counterflow premixed fuel-lean, methane- air flames. It was also found that, in addition to the stretch extinction limit at a high stretch rate, there exits a radiation extinction limit at a low stretch rate. Furthermore, the relationship between these two extinction limits and the equivalence ratio is obtained.
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U2 - 10.1016/S0010-2180(97)00050-3
DO - 10.1016/S0010-2180(97)00050-3
M3 - Article
AN - SCOPUS:0031172744
SN - 0010-2180
VL - 109
SP - 639
EP - 646
JO - Combustion and Flame
JF - Combustion and Flame
IS - 4
ER -