A method of determining flame radiation fraction induced by interaction burning of tri-symmetric propane fires in open space based on weighted multi-point source model

Jie JI, Junrui DUAN, Huaxian WAN

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PDF(1152 KB)
Front. Energy ›› 2022, Vol. 16 ›› Issue (6) : 1017-1026. DOI: 10.1007/s11708-020-0716-x
RESEARCH ARTICLE
RESEARCH ARTICLE

A method of determining flame radiation fraction induced by interaction burning of tri-symmetric propane fires in open space based on weighted multi-point source model

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Abstract

The interaction of multiple fires may lead to a higher flame height and more intense radiation flux than a single fire, which increases the possibility of flame spread and risks to the surroundings. Experiments were conducted using three burners with identical heat release rates (HRRs) and propane as the fuel at various spacings. The results show that flames change from non-merging to merging as the spacing decreases, which result in a complex evolution of flame height and merging point height. To facilitate the analysis, a novel merging criterion based on the dimensionless spacing S/zc was proposed. For non-merging flames (S/zc >0.368), the flame height is almost identical to a single fire; for merging flames (S/zc ≤0.368), based on the relationship between thermal buoyancy B and thrust P (the pressure difference between the inside and outside of the flame), a quantitative analysis of the flame height, merging point height, and air entrainment was formed, and the calculated merging flame heights show a good agreement with the measured experimental values. Moreover, the multi-point source model was further improved, and radiation fraction of propane was calculated. The data obtained in this study would play an important role in calculating the external radiation of propane fire.

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Keywords

flame interaction / air entrainment / flame height / multi-point source model / thermal radiation

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Jie JI, Junrui DUAN, Huaxian WAN. A method of determining flame radiation fraction induced by interaction burning of tri-symmetric propane fires in open space based on weighted multi-point source model. Front. Energy, 2022, 16(6): 1017‒1026 https://doi.org/10.1007/s11708-020-0716-x

References

[1]
Ji J, Wan H X, Gao Z H, Experimental study on flame merging behaviors from two pool fires along the longitudinal centerline of model tunnel with natural ventilation. Combustion and Flame, 2016, 173: 307–318
CrossRef Google scholar
[2]
Fan C G, Ji J, Li Y Z, Experimental study of sidewall effect on flame characteristics of heptane pool fires with different aspect ratios and orientations in a channel. Proceedings of the Combustion Institute, 2017, 36(2): 3121–3129
CrossRef Google scholar
[3]
He K, Cheng X, Yao Y, Characteristics of multiple pool fires in a tunnel with natural ventilation. Journal of Hazardous Materials, 2019, 369: 261–267
CrossRef Google scholar
[4]
Shi C, Liu W, Hong W, A modified thermal radiation model with multiple factors for investigating temperature rise around pool fire. Journal of Hazardous Materials, 2019, 379(5): 120801
CrossRef Google scholar
[5]
Liu N A, Zhang S, Luo X, Interaction of two parallel rectangular fires. Proceedings of the Combustion Institute, 2019, 37(3): 3833–3841
CrossRef Google scholar
[6]
Wan H X, Ji J, Li K, Effect of air entrainment on the height of buoyant turbulent diffusion flames for two fires in open space. Proceedings of the Combustion Institute, 2017, 36(2): 3003–3010
CrossRef Google scholar
[7]
Putnam A, Speich C. A model study of the interaction of multiple turbulent diffusion flames. Symposium (International) on Combustion, 1963, 9(1): 867–877
CrossRef Google scholar
[8]
Thomas P, Baldwin R, Heselden A. Buoyant diffusion flames: some measurements of air entrainment, heat transfer, and flame merging. Symposium (International) on Combustion, 1965, 10(1): 983–996
CrossRef Google scholar
[9]
Sugawa O, Takahashi W. Flame height behavior from multi-fire sources. Fire and Materials, 1993, 17(3): 111–117
CrossRef Google scholar
[10]
Wan H X, Gao Z H, Ji J, Experimental study on merging behaviors of two identical buoyant diffusion flames under an unconfined ceiling with varying heights. Proceedings of the Combustion Institute, 2019, 37(3): 3899–3907
CrossRef Google scholar
[11]
Wan H X, Gao Z H, Ji J, Effects of pool size and spacing on burning rate and flame height of two square heptane pool fires. Journal of Hazardous Materials, 2019, 369: 116–124
CrossRef Google scholar
[12]
Delichatsios M A. A correlation for the flame height in” group” fires. Fire Science & Technology, 2007, 26(1): 1–8
CrossRef Google scholar
[13]
Fukuda Y, Kamikawa D, Hasemi Y, Flame characteristics of group fires. Fire Science & Technology, 2004, 23(2): 164–169
CrossRef Google scholar
[14]
Weng W, Kamikawa D, Hasemi Y. Experimental study on merged flame characteristics from multifire sources with wood cribs. Proceedings of the Combustion Institute, 2015, 35(3): 2597–2606
CrossRef Google scholar
[15]
Wan H X, Gao Z H, Ji J, Predicting heat fluxes received by horizontal targets from two buoyant turbulent diffusion flames of propane burning in still air. Combustion and Flame, 2018, 190: 260–269
CrossRef Google scholar
[16]
Gong C Z, Ding L, Wan H X, Spatial temperature distribution of rectangular n-heptane pool fires with different aspect ratios and heat fluxes received by adjacent horizontal targets. Fire Safety Journal, 2020, 112: 102959
CrossRef Google scholar
[17]
Shokri M, Beyler C. Radiation from large pool fires. Journal of Fire Protection Engineering, 1989, 1(4): 141–149
CrossRef Google scholar
[18]
Liu Q, Liu N A, Huang X. Radiative heat transfer from multiple discrete fires. Journal of Fire Sciences, 2017, 35(6): 535–546
CrossRef Google scholar
[19]
Markstein G. Radiative properties of plastics fires. Symposium (International) on Combustion, 1979, 17(1): 1053–1062
CrossRef Google scholar
[20]
Bennett G. The SFPE handbook of fire protection engineering: By P. J. DiNenno, C. L. Beyler, R. L. P. Custer, W. D. Walton and J. M. Watts, National Fire Protection Association, Quincy, MA and Society of Fire Prot, Elsevier, 1990
CrossRef Google scholar
[21]
Mudan K S. Thermal radiation hazards from hydrocarbon pool fires. Progress in Energy and Combustion Science, 1984, 10(1): 59–80
CrossRef Google scholar
[22]
May W, Mcqueen W. Radiation from large liquefied natural gas fires. Combustion Science and Technology, 1973, 7(2): 51–56
CrossRef Google scholar
[23]
Yan W G, Wang C J, Guo J. One extended OTSU flame image recognition method using RGBL and stripe segmentation. Applied Mechanics and Materials, 2012, 121–126: 2141–2145
CrossRef Google scholar
[24]
Otsu N. A threshold selection method from gray-level histograms. IEEE Transactions on Systems, Man, and Cybernetics, 1979, 9(1): 62–66
CrossRef Google scholar
[25]
James G Q. Fundamentals of Fire Phenomena. New York: Springer, 2005
[26]
Gao Z H, Ji J, Wan H X, Li K, Sun J. An investigation of the detailed flame shape and flame length under the ceiling of a channel. Proceedings of the Combustion Institute, 2015, 35(3): 2657–2664
CrossRef Google scholar
[27]
Dupuy J, Marechal J, Morvan D. Fires from a cylindrical forest fuel burner: combustion dynamics and flame properties. Combustion and Flame, 2003, 135(1-2): 65–76
CrossRef Google scholar
[28]
Shintani Y, Nagaoka T, Deguchi Y, Ido K, Harada K. Simple method to predict downward heat flux from flame to floor. Fire Science & Technology, 2014, 33(1): 17–34
CrossRef Google scholar
[29]
Lowesmith B J, Hankinson G, Acton M, Chamberlain G. An overview of the nature of hydrocarbon jet fire hazards in the oil and gas industry and a simplified approach to assessing the hazards. Process Safety and Environmental Protection, 2007, 85(3): 207–220
CrossRef Google scholar
[30]
Markstein G H. Radiative energy transfer from turbulent diffusion flames. Combustion and Flame, 1976, 27: 51–63
CrossRef Google scholar
[31]
Hankinson G, Lowesmith B J. A consideration of methods of determining the radiative characteristics of jet fires. Combustion and Flame, 2012, 159(3): 1165–1177
CrossRef Google scholar
[32]
Souil J, Joulain P, Gengembre E. Experimental and theoretical study of thermal radiation from turbulent diffusion flames to vertical target surfaces. Combustion Science and Technology, 1984, 41(1–2): 69–81
CrossRef Google scholar
[33]
Hurley M J, Gottuk D T, Hall J R, SFPE Handbook of Fire Protection Engineering. New York: Springer, 2015

Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant Nos. 52036009 and 51722605).

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2021 Higher Education Press
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