Effect of Turbulence on Explosion Characteristics of Aluminum Dust/Air

doi:10.3969/j.issn.1000-1093.2016.03.010

Abstract

Abstract: The dispersion and explosion processes of aluminum dust in 20 L spherical confined chamber are numerically simulated based on computational fluid dynamics theory. The influence of turbulence intensity on the explosion characteristics of aluminum dusts with different concentrations at various ignition delay times is studied. The results indicate that the ignition delay time has a significant effect on maximum explosion pressure and maximum rate of pressure rise of aluminum dust explosion, and there exists an optimum ignition delay time for p_max. With the increase in the concentration of aluminum dust in the chamber, the optimum ignition delay time increases first and then remains unchanged, therefore a single ignition delay time cannot accurately reflect the explosion powers of aluminum dusts with different concentrations. Both turbulence intensity and distribution of dust cloud have the influences on maximum explosion pressure and maximum rate of pressure rise. The uniformity of dust distribution has a greater effect on maximum explosion pressure than the turbulence intensity, while the turbulence intensity has a greater effect on maximum rate of pressure rise than the uniformity of dust distribution.

Key words: ordnance science and technology, aluminum dust, concentration, ignition delay time, turbulence intensity

CLC Number:

O389

SHEN Shi-lei, ZHANG Qi, MA Qiu-ju, LI Dong, YAN Hua. Effect of Turbulence on Explosion Characteristics of Aluminum Dust/Air[J]. Acta Armamentarii, 2016, 37(3): 455-461.

References

［1］罗艾民, 张奇, 李建平, 等. 爆炸驱动作用下固体燃料分散过程的计算分析［J］. 北京理工大学学报, 2005, 25(2): 103-107.
LUO Ai-min，ZHANG Qi，LI Jian-ping，et al. Computational analysis of dispersion process of explosively driven solid fuel［J］. Trasactions of Beijing Institute of Technology, 2005, 25(2): 103-107. (in Chinese)
［2］赵衡阳. 气体和粉尘爆炸原理［M］. 北京: 北京理工大学出版社, 1996.
ZHAO Heng-yang. Principles of gas and dust explosion［M］. Beijing: Beijing Institute of Technology Press, 1996. (in Chinese)
［3］ Zhang Q，Zhang B. Effect of ignition delay on explosion parameters of corn dust/air in confined chamber［J］. Journal of Loss Prevention in the Process Industries, 2015, 33（12）: 23-28.
［4］张博, 张奇, 谭汝媚. 喷粉压力及点火延迟时间对粉尘爆炸参数的影响［J］. 高压物理学报, 2014, 28(2): 183-189.
ZHANG Bo, ZHANG Qi, TAN Ru-mei. Influence of dispersion pressure and ignition delay time on the dust explosion parameters［J］. Chinese Journal of High Pressure Physics, 2014, 28(2): 183-189. (in Chinese)
［5］ Liu Q M, Bai C H, Li X D, et al. Coal dust/air explosion in a large-scale tube［J］. Fuel, 2010, 89(2): 329-335.
［6］ Di Sarli V, Russo P, Sanchirico R, et al. CFD simulations of dust dispersion in the 20L vessel：effect of nominal dust concentration［J］. Journal of Loss Prevention in the Process Industries, 2014, 27（1）: 8-12.
［7］ Liu X L，Zhang Q，Wang Y. Influence of vapor-liquid two-phase n-hexane/air mixtures on flammability limit and minimum ignition energy［J］. Industrial & Engineering Chemistry Research，2014，53(32)：12856-12865.
［8］ Dufaud O, Traoré M, Perrin L, et al. Experimental investigation and modelling of aluminum dusts explosions in the 20 L sphere［J］. Journal of Loss Prevention in the Process Industries, 2010, 23(2): 226-236.
［9］ Fluent Incorporated. Fluent 6.3 user’s guide［M］. Cavendish: Fluent Incorporated, 2006.
［10］ Kwon Y S, Gronmov A A, Ilyin A P, et al. The mechanism of combustion of superfine aluminum powders［J］. Combustion and Flame, 2003, 133(4): 385-391.
［11］陈志华，范宝春，李鸿志. 燃烧管内悬浮铝粉燃烧爆炸过程的研究［J］. 高压物理学报, 2006,20(2): 157-162.
CHEN Zhi-hua, FAN Bao-chun. LI Hong-zhi. Investigations on combustion and explosion process of suspended aluminum particles in a large combustion tube［J］.Chinese Journal of High Pressure Physics, 2006,20(2): 157-162. (in Chinese)
［12］温正，石良辰，任毅如. FLUENT流体计算应用教程［M］. 北京：清华大学出版社，2009.
WEN Zheng, SHI Liang-chen, REN Yi-ru. Application course in FLUENT fluid calculation［M］. Beijing: Tsinghua University Press, 2009.(in Chinese)
［13］ Di Benedetto A, Russo P，Sanchirico R，et al. CFD simulations of turbulent fluid flow and dust dispersion in the 20 L liter explosion vessel［J］. AICHE Journal, 2013, 59(7): 2485-2496.
［14］ Sun J H, Dobashi R, Hirano T. Structure of flames propagating through aluminum particles cloud and combustion process of particles［J］. Journal of Loss Prevention in the Process Industries, 2006, 19(6): 769-773.
［15］谭汝媚, 张奇, 张博. 点火延迟时间对铝粉爆炸特性参数的影响［J］. 爆炸与冲击, 2014,34(1): 17-22.
TAN Ru-mei, ZHANG Qi, ZHANG Bo. Effects of ignition delay time on characteristic parameters of aluminum dust explosion［J］. Explosion and Shock Waves, 2014,34(1): 17-22. (in Chinese)
［16］ Cashdollar K L, Zlochower I A. Explosion temperatures and pressures of metals and other elemental dust clouds［J］. Journal of Loss Prevention in the Process Industries, 2007,20(4): 337-348.
［17］ Eckhoff R K. Dust explosion in the process industries［J］. Journal of Hazardous Materials, 1991,54(3):266-267.
［18］ Nagy J, Verakis C. Development and contral of dust explosions ［M］. New York: Marcel Dekker Inc, 1985.
［19］ Cuervo N, Murillo C, Dufaud O, et al. Combining CFD simulations and PIV measurements to optimize the conditions for dust explosion tests［J］. Chemical Engineering Transactions, 2014，36:259-264.

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