TY - JOUR
T1 - Experimental study on merged flame characteristics from multifire sources with wood cribs
AU - Weng, Wenguo
AU - Kamikawa, Daisuke
AU - Hasemi, Yuji
N1 - Funding Information:
This paper was supported by National Natural Science Foundation of China (Grant No. 51076073 ), China National Key Basic Research Special Funds Project (Grant No. 2012CB719705 ). The experiments were conducted at the Building Research Institute, Tsukuba, by the support of the National Institute of Land and Infrastructure Management, MLIT.
Publisher Copyright:
© 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
PY - 2015
Y1 - 2015
N2 - This paper describes a series of experiments that were carried out to study merged flame characteristics. A specially designed wood crib burner were operated with the square burner configurations of 2 by 2 and 3 by 3, and various separation distances of 0, 1.5, 3 and 5 cm. The heat release rate, the mass loss rate, the heat feedback from the flame to the fuel surface, and the radiative heat flux were measured. The corresponding combustion efficiency and pyrolysis efficiency are calculated. The experimental data of the radiative heat flux from the merged flame are compared with the computed values of an empirical model from a single fire. Experimental data show that bigger separation distance and more burners advance the combustion efficiency due to more entrained ambient air; however have no obvious effects on the pyrolysis progress. The overall trend of the computed radiative heat flux is similar to that of the experimental data for the merged flame; only the times of the computed peak radiative heat fluxes are always lower than those of the experimental data.
AB - This paper describes a series of experiments that were carried out to study merged flame characteristics. A specially designed wood crib burner were operated with the square burner configurations of 2 by 2 and 3 by 3, and various separation distances of 0, 1.5, 3 and 5 cm. The heat release rate, the mass loss rate, the heat feedback from the flame to the fuel surface, and the radiative heat flux were measured. The corresponding combustion efficiency and pyrolysis efficiency are calculated. The experimental data of the radiative heat flux from the merged flame are compared with the computed values of an empirical model from a single fire. Experimental data show that bigger separation distance and more burners advance the combustion efficiency due to more entrained ambient air; however have no obvious effects on the pyrolysis progress. The overall trend of the computed radiative heat flux is similar to that of the experimental data for the merged flame; only the times of the computed peak radiative heat fluxes are always lower than those of the experimental data.
KW - Heat feedback
KW - Heat release rate
KW - Merged flame
KW - Multifire sources
KW - Wood crib combustion
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U2 - 10.1016/j.proci.2014.05.112
DO - 10.1016/j.proci.2014.05.112
M3 - Article
AN - SCOPUS:84947899888
SN - 1540-7489
VL - 35
SP - 2597
EP - 2606
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
IS - 3
ER -