TY - JOUR
T1 - Extinction of low-stretched diffusion flame in microgravity
AU - Maruta, Kaoru
AU - Yoshida, Masaharu
AU - Guo, Hongsheng
AU - Ju, Yiguang
AU - Niioka, Takashi
N1 - Funding Information:
The authors would like to express their thanks to Susumu Hasegawa and Atsutaka Honda for their assistance in carrying out the present experiment. This work was performed under the management of the Japan Space Utilization Promotion Center as a part of the research and decelop-ment project of Advanced Furnaces and Boilers supported by the New Energy and Industrial Technology Development Organization.
PY - 1998/1
Y1 - 1998/1
N2 - Extinction of counterflow diffusion flames of air and methane diluted with nitrogen is studied by drop tower experiments and numerical calculation using detailed chemistry and transport properties. Radiative heat loss from the flame zone is taken into consideration. Experimental results identified two kinds of extinction at the same fuel concentration, that is, in addition to the widely known stretch extinction, another type of extinction is observed when the stretch rate is sufficiently low. Consequently, plots of stretch rates versus fuel concentration limits exhibit a 'C-shaped' extinction curve. Numerical calculation including radiative heat loss from the flame zone qualitatively agreed with the experimental results and indicated that the mechanism of counterflow diffusion flame extinction at low stretch rates was radiative heat loss.
AB - Extinction of counterflow diffusion flames of air and methane diluted with nitrogen is studied by drop tower experiments and numerical calculation using detailed chemistry and transport properties. Radiative heat loss from the flame zone is taken into consideration. Experimental results identified two kinds of extinction at the same fuel concentration, that is, in addition to the widely known stretch extinction, another type of extinction is observed when the stretch rate is sufficiently low. Consequently, plots of stretch rates versus fuel concentration limits exhibit a 'C-shaped' extinction curve. Numerical calculation including radiative heat loss from the flame zone qualitatively agreed with the experimental results and indicated that the mechanism of counterflow diffusion flame extinction at low stretch rates was radiative heat loss.
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U2 - 10.1016/S0010-2180(97)81766-X
DO - 10.1016/S0010-2180(97)81766-X
M3 - Article
AN - SCOPUS:0030835016
VL - 112
SP - 181
EP - 187
JO - Combustion and Flame
JF - Combustion and Flame
SN - 0010-2180
IS - 1-2
ER -