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腔体宽度及腔体内粉末填充对甲烷/空气爆炸超压演化规律和火焰传播特性的影响

Influence of Cavity Width and Powder Filling in a Cavity on Overpressure Evolution Laws and Flame Propagation Characteristics of Methane/Air Explosion.

作者信息

Zhou Hui, Mu Chaomin

机构信息

School of Mining and Safety Engineering, Anhui University of Science & Technology, Huainan, Anhui 232001, China.

Key Lab of Mining Coal Safety and Efficiently Constructed by Anhui Province and Ministry of Education, Anhui University of Science & Technology, Huainan, Anhui 232001, China.

出版信息

ACS Omega. 2021 Apr 6;6(15):10072-10084. doi: 10.1021/acsomega.1c00054. eCollection 2021 Apr 20.

DOI:10.1021/acsomega.1c00054
PMID:34056162
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8153671/
Abstract

Passive explosion suppression remains an indispensable auxiliary method for gas explosion suppression due to its low cost. To explore a new type of explosion passive suppression technology, three rectangular cavities with different width-diameter ratios were designed and laid in a large-scale methane/air explosion experiment system, and its explosion suppression performance was evaluated by measuring the changes in the explosion flame and shock wave before and after passing through the cavity. The results show that the suppression effect of the cavity is affected by its width. The larger the width-diameter ratio, the faster the attenuation of the flame and shock wave. The cavity-combined aluminum hydroxide powder effectively improves the suppression effect. When the filling amount of the powder is 140 g, the flame is quenched. However, there is an optimal powder filling degree for the suppression of the shock wave in the limited space of the cavity. In the test range, the maximum decay rate of the overpressure and impulse are 49.4 and 39.4%, respectively. This study can provide theoretical guidelines for the suppression of gas explosion.

摘要

由于成本低廉，被动抑爆仍然是气体抑爆不可或缺的辅助方法。为探索新型爆炸被动抑制技术，设计了三种不同宽径比的矩形腔，并将其布置在大型甲烷/空气爆炸实验系统中，通过测量爆炸火焰和冲击波通过腔体前后的变化来评估其抑爆性能。结果表明，腔体的抑制效果受其宽度影响。宽径比越大，火焰和冲击波的衰减越快。腔体与氢氧化铝粉末组合能有效提高抑制效果。当粉末填充量为140 g时，火焰熄灭。然而，在腔体有限空间内抑制冲击波存在一个最佳粉末填充度。在试验范围内，超压和冲量的最大衰减率分别为49.4%和39.4%。本研究可为气体爆炸抑制提供理论指导。

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