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

LI Guoqing; DU Yang; QI Sheng; WANG Shimao; LI Meng; LI Run

doi:10.11883/bzycj-2017-0215

Volume 38 Issue 6

Sep. 2018

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LI Guoqing, DU Yang, QI Sheng, WANG Shimao, LI Meng, LI Run. Large eddy simulation on the vented gasoline-air mixture explosions in a semi-confined pipe with continuous circular hollow obstacles[J]. Explosion And Shock Waves, 2018, 38(6): 1286-1394. doi: 10.11883/bzycj-2017-0215

Citation:

LI Guoqing, DU Yang, QI Sheng, WANG Shimao, LI Meng, LI Run. Large eddy simulation on the vented gasoline-air mixture explosions in a semi-confined pipe with continuous circular hollow obstacles[J]. Explosion And Shock Waves, 2018, 38(6): 1286-1394. doi: 10.11883/bzycj-2017-0215

Citation:

LI Guoqing, DU Yang, QI Sheng, WANG Shimao, LI Meng, LI Run. Large eddy simulation on the vented gasoline-air mixture explosions in a semi-confined pipe with continuous circular hollow obstacles[J]. Explosion And Shock Waves, 2018, 38(6): 1286-1394. doi: 10.11883/bzycj-2017-0215

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

doi: 10.11883/bzycj-2017-0215

LI Guoqing^1
,,
DU Yang¹,
QI Sheng^{1, 2},
WANG Shimao¹,
LI Meng¹,
LI Run¹

1.
Department of Petroleum Supply Engineering, Army Service University, Chongqing 401311, China
2.
62250 Troops, Golmud 816099, Qinghai, China

Received Date: 2017-06-22
Rev Recd Date: 2017-09-06
Publish Date: 2018-11-25

Abstract

Abstract

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.
- vented gasoline-air mixture explosions,
- large eddy simulation,
- obstacles,
- flame characteristics

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References(24)

References

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