Effect of obstacles on explosion characteristics of methane/hydrogen

YU Minggao; YANG Xufeng; ZHENG Kai; WAN Shaojie

doi:10.11883/bzycj-2017-0172

Volume 38 Issue 1

Nov. 2017

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Article Navigation > Explosion And Shock Waves > 2018 > 38(1): 19-27

YU Minggao, YANG Xufeng, ZHENG Kai, WAN Shaojie. Effect of obstacles on explosion characteristics of methane/hydrogen[J]. Explosion And Shock Waves, 2018, 38(1): 19-27. doi: 10.11883/bzycj-2017-0172

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YU Minggao, YANG Xufeng, ZHENG Kai, WAN Shaojie. Effect of obstacles on explosion characteristics of methane/hydrogen[J]. Explosion And Shock Waves, 2018, 38(1): 19-27. doi: 10.11883/bzycj-2017-0172

YU Minggao, YANG Xufeng, ZHENG Kai, WAN Shaojie. Effect of obstacles on explosion characteristics of methane/hydrogen[J]. Explosion And Shock Waves, 2018, 38(1): 19-27. doi: 10.11883/bzycj-2017-0172

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Effect of obstacles on explosion characteristics of methane/hydrogen

doi: 10.11883/bzycj-2017-0172

1.
State Key Laboratory of Coal Mine Disaster Dynamics Control, Chongqing University, Chongqing 400044, China
2.
School of Safety Science Engineering Henan Polytechnic University, Jiaozuo 454003, Henan, China

Received Date: 2017-05-16
Rev Recd Date: 2017-09-11
Publish Date: 2018-01-25

Abstract

Abstract

The effects of the blocking rate and shape of obstacles on the explosion characteristics of methane/hydrogen at the stoichiometric mixture were investigated using experimental facilities fabricated by ourselves. The results demonstrate that there are similar trends in the flame evolution structure obtained from all hydrogen fractions for the same condition, i.e. the blocking rate increases as the premixed flame propagation channel become more narrow; the rate of the premixed flame propagation increases along with the blocking rate and hydrogen fraction, and changes with the obstacle shape. Increasing the blocking rate and the hydrogen fraction enhances the maximum overpressure and speeds up the time of the arrival of the maximum overpressure; both the blocking rate and the hydrogen fraction affect the explosion characteristics of methane/hydrogen, and the explosion characteristics are affected by the blocking rate and the hydrogen fraction when the hydrogen fraction comes below 50%, but by the combustion characteristics of the premixed gas when it comes above 50%. This research can provide a theoretical foundation for the safe use of methane/hydrogen fuel.
- blocking rate,
- obstacle shape,
- methane/hydrogen,
- explosion characteristics

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References(24)

References

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