[1]吴豪,杨振欣,张婷,等.点火延时对褐煤粉尘爆炸特性的影响[J].爆破器材,2025,54(01):14-20.[doi:10.3969/j.issn.1001-8352.2025.01.003]
　WU Hao,YANG Zhenxin,ZHANG Ting,et al.Influence of Ignition Delay Time on Explosion Characteristics of Lignite Dust[J].EXPLOSIVE MATERIALS,2025,54(01):14-20.[doi:10.3969/j.issn.1001-8352.2025.01.003]
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点火延时对褐煤粉尘爆炸特性的影响()
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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
54
期数:
2025年01
页码:
14-20
栏目:
基础理论
出版日期:
2025-01-09

文章信息/Info

Title:
Influence of Ignition Delay Time on Explosion Characteristics of Lignite Dust
文章编号:
5951
作者:
吴豪; 杨振欣; 张婷; 许张归; 史学强
中北大学环境与安全工程学院（山西太原，030051）
Author(s):
WU Hao;  YANG Zhenxin;  ZHANG Ting;  XU Zhanggui;  SHI Xueqiang
School of Environment and Safety Engineering, North University of China (Shanxi Taiyuan, 030051)
关键词:
点火延时; 点火能量; 煤尘爆炸; 火焰传播; 数值模拟
Keywords:
ignition delay time;  ignition energy;  coal dust explosion;  flame propagation;  numerical simulation
分类号:
X932
DOI:
10.3969/j.issn.1001-8352.2025.01.003
文献标志码:
A
摘要:
煤炭加工过程中存在着不可忽视的煤尘爆炸安全隐患。采用哈特曼管装置开展了不同点火延时条件下褐煤粉尘的点火实验，研究了煤尘的点火临界特性。基于最小点火能变化特征，探究了不同点火延时条件下煤尘爆炸火焰的形态特征和传播规律。结合实验结果与数值模拟，分析了煤尘的扩散动力学特性。结果表明：煤尘的最小点火能随着点火延时的增加先减小、后增加；当点火延时为90 ms时，煤尘最小点火能达到最低，为244 mJ；在点火能量1 280 mJ条件下，点火延时为90 ms时，火焰最明亮，呈蘑菇云状态，前锋面高度最高。实验结果与模拟结果证明，点火延时90 ms附近，煤尘分散较好。
Abstract:
There is an undeniable safety hazard of coal dust explosion in the coal processing process. Ignition experiment of lignite dust under different ignition delay times was carried out using a Hartmann tube device, and the ignition critical characteristics of coal dust were studied. Based on the variation characteristics of the minimum ignition energy, the morphological features and propagation laws of flame caused by coal dust explosion under different ignition delay times were explored. The diffusion dynamic characteristics of coal dust were analyzed by combining experimental results with numerical simulations. The results show that the minimum ignition energy of coal dust decreases first and then increases with the increase of ignition delay time. When the ignition delay time is 90 ms, the minimum ignition energy of coal dust reaches 244 mJ. At an ignition energy of 1 280 mJ and an ignition delay time of 90 ms, the flame reaches its peak brightness, manifesting as a mushroom cloud with the highest flame front. The experimental and simulation results demonstrate that the dust dispersion is good around an ignition delay time of 90 ms.

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备注/Memo

备注/Memo:
收稿日期：2024-05-16
基金项目：中国博士后科学基金面上项目(2023M733276)；山西省基础研究计划项目(202303021212202)
第一作者：吴豪（1998—），男，硕士研究生，主要从事可燃气体、粉尘爆炸动力学研究。E-mail：1551012024@qq.com
通信作者：史学强（1994—），男，博士，讲师，主要从事多相燃烧与爆炸研究。E-mail：shixueqiang@nuc.edu.cn
更新日期/Last Update: 2025-01-10