Large eddy simulation on the vented gasoline-air mixture explosions in a semi-confined pipe with continuous circular hollow obstacles

被引：0
|
作者：
Li G. [1 ]
Du Y. [1 ]
Qi S. [1 ,2 ]
Wang S. [1 ]
Li M. [1 ]
Li R. [1 ]
机构：
[1] Department of Petroleum Supply Engineering, Army Service University, Chongqing
[2] 62250 Troops, Golmud, 816099, Qinghai
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2018年 / 38卷 / 06期
关键词：
Flame characteristics; Large eddy simulation; Obstacles; Vented gasoline-air mixture explosions;
D O I：
10.11883/bzycj-2017-0215
中图分类号：
学科分类号：
摘要：
WALE LES model coupled with Zimont premixed combustion model were applied to study the characteristics of the flame of gasoline-air mixture explosions. Results by LES simulation, RNG k-ε model and experiments were compared with each other, and the conclusions show that: (1) LES is more accurate than RNG k-ε turbulence model in predicting gasoline-air mixture explosion overpressure, flame propagation speed and the variation of flame shape, and it can show more refined structure of flow field; (2) The obstacles induce a turbulent flow field in the pipeline, which can cause the flame to produce wrinkle and bend deformation, increase the flame surface area and accelerate the flame propagation; (3) The explosion overpressure, the flame propagation speed and the flame surface area are closely related. They have significant coupling and show nearly the same changing tendency. © 2018, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
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页码：1286 / 1294
页数：8
相关论文
共 24 条
  • [1] Du Y., Li G., Wu S., Et al., Explosion intensity of gasoline-air mixture in the pipeline containing a T-shaped branch pipe, Explosion and Shock Waves, 35, 5, pp. 729-734, (2015)
  • [2] Li G., Du Y., Qi S., Li Y., Et al., Explosions of gasoline-air mixtures in a closed pipe containing a T-shaped branch structure, Journal of Loss Prevention in the Process Industries, 43, pp. 529-536, (2016)
  • [3] Johansen C., Ciccarelli G., Visualization of the unburned gas flow field ahead of an accelerating flame in an obstructed square channel, Combustion and Flame, 156, 2, pp. 405-416, (2009)
  • [4] Chen P., Li Y., Huang F., Et al., LES approach to premixed methane/air flame propagating in the closed duct with a square-hole obstacl, Explosion and Shock Waves, 37, 1, pp. 21-26, (2017)
  • [5] Wang G., Zhang J., Li D., Et al., Large eddy simulation of impacted obstacles' effects on premixed flame's characteristics, Explosion and Shock Waves, 37, 1, pp. 68-76, (2017)
  • [6] Wen X., Yu M., Ji W., Et al., Methane-air explosion characteristics with different obstacle configurations, International Journal of Mining Science and Technology, 25, 2, pp. 213-218, (2015)
  • [7] Wen X., Yu M., Liu Z., Et al., Large eddy simulation of methane-air deflagration in an obstructed chamber using different combustion models, Journal of Loss Prevention in the Process Industries, 25, 4, pp. 730-738, (2012)
  • [8] Na'Inna A.M., Phylaktou H.N., Andrews G.E., The acceleration of flames in tube explosions with two obstacles as a function of the obstacle separation distance, Journal of Loss Prevention in the Process Industries, 26, 6, pp. 1597-1603, (2013)
  • [9] Blanchard R., Arndt D., Gratz R., Et al., Explosions in closed pipes containing baffles and 90 degree bends, Journal of Loss Prevention in the Process Industries, 23, 2, pp. 253-259, (2010)
  • [10] Hisken H., Enstad G.A., Middha P., Et al., Investigation of concentration effects on the flame acceleration in vented channels, Journal of Loss Prevention in the Process Industries, 36, pp. 447-459, (2015)
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