Experimental and numerical studies on the suppression of methane explosion using CO<sub>2</sub> in a mini vessel

Luo Zhen-min; Wang Tao; Cheng Fang-ming; Song Yu; Wu Kang

doi:10.11883/1001-1455-(2015)03-0393-08

Volume 35 Issue 3

Jun. 2015

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Luo Zhen-min, Wang Tao, Cheng Fang-ming, Song Yu, Wu Kang. Experimental and numerical studies on the suppression of methane explosion using CO2 in a mini vessel[J]. Explosion And Shock Waves, 2015, 35(3): 393-400. doi: 10.11883/1001-1455-(2015)03-0393-08

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Luo Zhen-min, Wang Tao, Cheng Fang-ming, Song Yu, Wu Kang. Experimental and numerical studies on the suppression of methane explosion using CO₂ in a mini vessel[J]. Explosion And Shock Waves, 2015, 35(3): 393-400. doi: 10.11883/1001-1455-(2015)03-0393-08

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Experimental and numerical studies on the suppression of methane explosion using CO₂ in a mini vessel

doi: 10.11883/1001-1455-(2015)03-0393-08

Luo Zhen-min^{1, 2
,},
Wang Tao^{1, 2},
Cheng Fang-ming^{1, 2},
Song Yu^{1, 2},
Wu Kang^{1, 2}

1.
School of Energy Engineering, Xi'an University of Science & Technology, Xi'an 710054, Shaanxi, China
2.
Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi'an University of Science & Technology, Xi'an 710054, Shaanxi, China

Received Date: 2013-11-11
Rev Recd Date: 2014-04-04
Publish Date: 2015-05-25

Abstract

Abstract

Gas explosion is the leading accident in underground coal mining in China.In order to prevent mine gas explosion effectively, methane, the dominant sector of mine gases, was taken as experimental medium.A quartz tube test system, in which the ratio of length to diameter is 18, was designed and made.A high-speed camera and numerical simulation software FLACS was employed to study the characteristics of methane explosion.The impact of CO₂at various concentrations on the suppression of 9%methane explosion was investigated.Fluctuations were observed on the explosion pressure, the velocity of the flame front and the velocity of the mixed gases during the propagation of the gas explosion.The time to reach the maximum for the pressure was not simultaneous with that for velocity.Additionally, carbon dioxide can effectively suppress the reaction between methane and oxygen and the larger the concentration of CO₂is, the better the suppression effect will be.Simulation results are in accordance with the experiments.
- mechanics of explosion,
- flame propagation characteristics,
- FLACS,
- gas explosion,
- CO₂

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References

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