Flame propagation characteristics of lycopodium dust explosion under explosion pressure accumulation conditions

YU Jianliang; JI Wentao; YAN Xingqing; YU Xiaozhe; HOU Yujie

doi:10.11883/bzycj-2017-0436

Volume 39 Issue 2

Feb. 2019

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Article Navigation > Explosion And Shock Waves > 2019 > 39(2): 025401

DENG Shu-sheng, GENG Ji-hui, TAN Jun-jie. Numerical calculation of blast loads from a bursting pressurized vessel[J]. Explosion And Shock Waves, 2007, 27(1): 1-6. doi: 10.11883/1001-1455(2007)01-0001-06

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YU Jianliang, JI Wentao, YAN Xingqing, YU Xiaozhe, HOU Yujie. Flame propagation characteristics of lycopodium dust explosion under explosion pressure accumulation conditions[J]. Explosion And Shock Waves, 2019, 39(2): 025401. doi: 10.11883/bzycj-2017-0436

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Flame propagation characteristics of lycopodium dust explosion under explosion pressure accumulation conditions

doi: 10.11883/bzycj-2017-0436

School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Received Date: 2017-12-04
Rev Recd Date: 2018-02-06
Publish Date: 2019-02-05

Abstract

Abstract

An experimental setup which can withstand high pressure with good visibility was built. Flame propagation characteristics of lycopodium dust explosion were investigated under explosion pressure accumulation conditions. The experimental results showed that a space-dispersed fascicle-like flame structure was formed after the explosion of lycopodium dust under explosion pressure accumulation conditions. The flame front with a serrate structure was observed. However, on further increasing the dust concentration the flame continuity as well as the luminance increased and reached the top at the concentration of 750 g/m³. The velocity fluctuation during the flame propagation process of lycopodium dust explosion at different concentrations was found. But the fluctuation frequency decreased with the increase of dust concentration. The average flame propagation velocity increased and then decreased with the increase of dust concentration and reached the top at the dust concentration of 750 g/m³. The value of flame velocity was higher in the early stage, but lower in the later stage.
- pressure accumulation,
- dust explosion,
- flame structure,
- flame propagation velocity

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References(18)

References

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