Experimental study and three-dimensional simulation of premixed combustible gas explosion venting in a rectangular cavity

GUO Qiang; WANG Mingyang; GAO Kanghua; ZHAO Tianhui; SUN Song

doi:10.11883/bzycj-2017-0087

Volume 38 Issue 5

Jul. 2018

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GUO Qiang, WANG Mingyang, GAO Kanghua, ZHAO Tianhui, SUN Song. Experimental study and three-dimensional simulation of premixed combustible gas explosion venting in a rectangular cavity[J]. Explosion And Shock Waves, 2018, 38(5): 1099-1105. doi: 10.11883/bzycj-2017-0087

Citation:

GUO Qiang, WANG Mingyang, GAO Kanghua, ZHAO Tianhui, SUN Song. Experimental study and three-dimensional simulation of premixed combustible gas explosion venting in a rectangular cavity[J]. Explosion And Shock Waves, 2018, 38(5): 1099-1105. doi: 10.11883/bzycj-2017-0087

Citation:

GUO Qiang, WANG Mingyang, GAO Kanghua, ZHAO Tianhui, SUN Song. Experimental study and three-dimensional simulation of premixed combustible gas explosion venting in a rectangular cavity[J]. Explosion And Shock Waves, 2018, 38(5): 1099-1105. doi: 10.11883/bzycj-2017-0087

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Experimental study and three-dimensional simulation of premixed combustible gas explosion venting in a rectangular cavity

doi: 10.11883/bzycj-2017-0087

1.
State Key Laboratory for Disaster Prevention and Mitigation of Explosion and Impact, Army University of Engineering, Nanjing 210007, Jiangsu, China
2.
Navy Donghai Engineering Design Institute, Shanghai 200083, China

Received Date: 2017-03-20
Rev Recd Date: 2017-06-20
Publish Date: 2018-09-25

Abstract

Abstract

In order to investigate the overpressure and flame propagation of premixed combustible gas explosion venting in a large space, experiments of different concentrations of ethylene gas and two different vent sizes have been carried out in a rectangular cavity of 1.21 m³. Meanwhile, three-dimensional numerical simulations have been performed to simulate the ethylene air explosion venting process with a 0.18 m² vent area and a 7% concentration of ethylene gas. The results show that the overpressure has a different response with different vent size. When the small vent is used, the overpressure drops first and then rises, in which the second peak value is larger than the first one. The turbulence caused by the venting process increases significantly the flame front deformation and the flame propagation speed, resulting in the larger second peak. In contrast, for the large vent size, the second peak is lower. The simulated results are in good agreement with the experimental ones.
- rectangular cavity,
- ethylene gas,
- explosion venting,
- flame propagation

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References(15)

References

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