Inhibition effect of alumina on aluminum powder explosion characteristics in vertical duct

被引：0

作者：

Jin H. ^{[1
]}

Zheng L. ^{[1
,2
]}

Zhu X. ^{[1
]}

Yu S. ^{[1
,2
]}

Pan R. ^{[1
,2
]}

Du D. ^{[1
]}

Dou Z. ^{[1
]}

机构：

[1] State Key Laboratory Cultivation Base for Gas Geology and Gas Control, College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, Henan

[2] State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Jiaozuo, 454003, Henan

来源：

Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 04期

关键词：

Alumina; Aluminum explosion; Flame propagation; Inerting ratio; Overpressure;

D O I：

10.11949/0438-1157.20190620

中图分类号：

学科分类号：

摘要：

In order to study the influence of alumina on the explosion of aluminum powder, the explosion experiment was carried out in a self-built vertical duct. The flame structural evolution, flame front propagation and explosion overpressure waveform were analyzed. The results show that with the increase in the inerting ratio, alumina showed an obvious inhibitory effect on the flame at the aluminum explosion, and the alumina powder with small particle size had better inhibitory effect. Moreover, alumina exerted obvious inhibitory effect on flame front propagation in later stage, the flame propagation speed decreased, and the time required for the front to reach the duct exit was longer. For 4 μm alumina, the second peak overpressure disappeared at the inerting ratio of φ =30%, while the suppression efficiency was as high as 88.9% at the inerting ratio of φ =70%. However, the alumina explosion-proof effect with a particle size of 89 μm has obvious limit values. Exceeding the limit value, the explosion-proof effect is no longer improved. © All Right Reserved.

引用

页码：1929 / 1939

页数：10

共 33 条

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