TY - JOUR
T1 - Effects of radiation on spray flame characteristics and soot formation
AU - Watanabe, Hiroaki
AU - Kurose, Ryoichi
AU - Komori, Satoru
AU - Pitsch, Heinz
N1 - Funding Information:
The authors are grateful to Professor Fumiteru Akamatsu of Osaka University for providing the experimental data and useful discussions. The authors also thank Drs. Yuya Baba, Seung-Ming Hwang, and Maromu Otaka of CRIEPI and Dr. Mariko Nakamura of Osaka University for their help in developing the simulation code. They are also grateful to Drs. Matthias Ihme and Olivier Desjardins of the Center for Turbulence Research, Stanford University, for many inspiring discussions. Part of this work was supported by General Sekiyu Research Foundation.
PY - 2008/1
Y1 - 2008/1
N2 - Two-dimensional numerical simulations are applied to spray flames formed in a laminar counterflow and the effects of radiation on spray flame characteristics and soot formation are studied. N-Decane (C10H22) is used as the liquid fuel, and the droplet motion is calculated by the Lagrangian method. A single-step global reaction is employed for the combustion reaction model. A kinetically based soot model with a flamelet model is used to predict soot formation. Radiation is taken into account using the discrete ordinate method. The results show that radiation strongly affects the spray flame behavior and soot formation. Without the radiation model, flame temperature and soot volume fraction are greatly overestimated. The soot is formed in the diffusion flame regime, and its radiation emission increases with the increase in the equivalence ratio of the droplet fuel. This trend is in good agreement with that of the luminous flame behavior observed in the experiments.
AB - Two-dimensional numerical simulations are applied to spray flames formed in a laminar counterflow and the effects of radiation on spray flame characteristics and soot formation are studied. N-Decane (C10H22) is used as the liquid fuel, and the droplet motion is calculated by the Lagrangian method. A single-step global reaction is employed for the combustion reaction model. A kinetically based soot model with a flamelet model is used to predict soot formation. Radiation is taken into account using the discrete ordinate method. The results show that radiation strongly affects the spray flame behavior and soot formation. Without the radiation model, flame temperature and soot volume fraction are greatly overestimated. The soot is formed in the diffusion flame regime, and its radiation emission increases with the increase in the equivalence ratio of the droplet fuel. This trend is in good agreement with that of the luminous flame behavior observed in the experiments.
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U2 - 10.1016/j.combustflame.2007.07.021
DO - 10.1016/j.combustflame.2007.07.021
M3 - Article
AN - SCOPUS:37149028783
SN - 0010-2180
VL - 152
SP - 2
EP - 13
JO - Combustion and Flame
JF - Combustion and Flame
IS - 1-2
ER -