爆破器材2025，Vol.54Issue(1)：14-20,7.DOI:10.3969/j.issn.1001-8352.2025.01.003
点火延时对褐煤粉尘爆炸特性的影响
Influence of Ignition Delay Time on Explosion Characteristics of Lignite Dust
摘要
Abstract
There is an undeniable safety hazard of coal dust explosion in the coal processing process.Ignition ex-periment 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 in-crease 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,manifes-ting 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.关键词
点火延时/点火能量/煤尘爆炸/火焰传播/数值模拟Key words
ignition delay time/ignition energy/coal dust explosion/flame propagation/numerical simulation分类
安全科学引用本文复制引用
吴豪,杨振欣,张婷,许张归,史学强..点火延时对褐煤粉尘爆炸特性的影响[J].爆破器材,2025,54(1):14-20,7.基金项目
中国博士后科学基金面上项目(2023M733276) （2023M733276）
山西省基础研究计划项目(202303021212202) （202303021212202）
