Explosion characteristics of micro-sized aluminum dust in 20 L spherical vessel

CHEN Xiaokun; ZHANG Zijun; WANG Qiuhong; DENG Jun; LI Haitao; XU Qingfeng

doi:10.11883/bzycj-2017-0101

Volume 38 Issue 5

Jul. 2018

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Article Navigation > Explosion And Shock Waves > 2018 > 38(5): 1130-1136

CHEN Xiaokun, ZHANG Zijun, WANG Qiuhong, DENG Jun, LI Haitao, XU Qingfeng. Explosion characteristics of micro-sized aluminum dust in 20 L spherical vessel[J]. Explosion And Shock Waves, 2018, 38(5): 1130-1136. doi: 10.11883/bzycj-2017-0101

Citation:

CHEN Xiaokun, ZHANG Zijun, WANG Qiuhong, DENG Jun, LI Haitao, XU Qingfeng. Explosion characteristics of micro-sized aluminum dust in 20 L spherical vessel[J]. Explosion And Shock Waves, 2018, 38(5): 1130-1136. doi: 10.11883/bzycj-2017-0101

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Explosion characteristics of micro-sized aluminum dust in 20 L spherical vessel

doi: 10.11883/bzycj-2017-0101

CHEN Xiaokun^{1, 2},
ZHANG Zijun^{1, 2},
WANG Qiuhong^{1, 2
,
,},
DENG Jun^{1, 2},
LI Haitao^{1, 2},
XU Qingfeng^{1, 2}

1.
College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China
2.
Shanxi Key Lab of Prevention and Control of Coal Fire, College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China

Received Date: 2017-03-30
Rev Recd Date: 2017-07-21
Publish Date: 2018-09-25

Abstract

Abstract

In order to investigate explosion characteristics of micro-sized aluminum dust, a series of experiments were carried out to reveal the influences of ignition delay time, dust particle size and dust concentration on explosion parameters of aluminum dust using a 20 L nearly spherical dust explosion experimental system. The results show that:when the ignition delay time was within 20-120 ms, the maximum explosion pressure and maximum rate of pressure rise of aluminum dust initially increased but then decreased, the optimum ignition delay time increased with increasing particle size. The maximum explosion pressure of aluminum dust with particle size greater than 8.12 μm increased with decreasing particle size. Moreover, when the particle size is greater than 8.12 μm and the dust concentration range is 80-440 g/m³, the maximum explosion pressure and pressure rise rate of aluminum dust increased at beginning and then decreased, in addition, the smaller the dust particle size, the lower the dust concentration corresponding to the most violent explosion.
- aluminum dust explosion,
- ignition delay time,
- particle size,
- dust cloud concentration,
- maximum explosion pressure

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References

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