半封闭空间内氢化镁粉尘爆炸火焰的传播特性

毛文哲 张国涛 杨帅帅 徐子晖 王燕 纪文涛

毛文哲, 张国涛, 杨帅帅, 徐子晖, 王燕, 纪文涛. 半封闭空间内氢化镁粉尘爆炸火焰的传播特性[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0363
引用本文: 毛文哲, 张国涛, 杨帅帅, 徐子晖, 王燕, 纪文涛. 半封闭空间内氢化镁粉尘爆炸火焰的传播特性[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0363
MAO Wenzhe, ZHANG Guotao, YANG Shuaishuai, XU Zihui, WANG Yan, JI Wentao. Characteristics of hydrogenated magnesium dust explosion flame propagating in a semi-enclosed space[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0363
Citation: MAO Wenzhe, ZHANG Guotao, YANG Shuaishuai, XU Zihui, WANG Yan, JI Wentao. Characteristics of hydrogenated magnesium dust explosion flame propagating in a semi-enclosed space[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0363

半封闭空间内氢化镁粉尘爆炸火焰的传播特性

doi: 10.11883/bzycj-2023-0363
基金项目: 国家自然科学基金(52374197, U22A20120);河南省优秀青年科学基金(212300410042)
详细信息
    作者简介:

    毛文哲(1998- ),男,硕士研究生,kane_0529@163.com

    通讯作者:

    纪文涛(1989- ),男,博士,副教授,jiwentao@hpu.edu.cn

  • 中图分类号: O381

Characteristics of hydrogenated magnesium dust explosion flame propagating in a semi-enclosed space

  • 摘要: 在自行搭建的5 L粉尘爆炸火焰传播特性实验装置中,实验研究了半封闭空间内氢化镁(MgH2)粉尘爆炸火焰的传播特性。实验结果表明:随MgH2粉尘浓度增加,MgH2粉尘爆炸火焰由点火至稳定传播所用时间与预热区宽度先减小后增大,火焰亮度、锋面平滑度、及火焰传播速度呈先增大后减小趋势,并在质量浓度为800 g/m3时呈最佳燃烧状态。不同浓度的MgH2粉尘爆炸火焰传播瞬时速度整体呈波动趋势,波动幅度随浓度的提高而先减小后增大,800 g/m3时波动幅度最小,瞬时传播速度变化趋势随浓度的变化呈现不同的变化趋势。最后,根据MgH2爆炸产物的XRD测试结果,分析MgH2粉尘爆炸反应机理,发现MgH2粉尘爆炸是以MgH2燃烧反应为主并伴随有MgH2和Mg(OH)2分解以及Mg和H2氧化等多个总包反应的复杂过程,爆炸反应的最终产物为MgO。
  • 图  1  5 L粉尘爆炸火焰传播特性实验装置

    Figure  1.  The experimental device with a 5-L powder container for exploring dust explosion flame propagation characteristics

    图  2  MgH2粉尘粒径分布与微观形貌

    Figure  2.  MgH2 dust particle size distribution and micromorphology

    图  3  不同质量浓度的MgH2粉尘爆炸压力和压升速率

    Figure  3.  Explosion pressure and pressure rise rate of MgH2 dust as a function of dust mass concentration

    图  4  半封闭空间内200 g/m3 MgH2粉尘火焰形貌结构

    Figure  4.  Morphological structure of 200 g/m3 MgH2 dust flame in a semi-enclosed space

    图  5  半封闭空间内400 g/m3 MgH2粉尘火焰形貌结构

    Figure  5.  Morphological structure of 400 g/m3 MgH2 dust flame in a semi-enclosed space

    图  6  半封闭空间内600 g/m3 MgH2粉尘火焰形貌结构

    Figure  6.  Morphological structure of 600 g/m3 MgH2 dust flame in a semi-enclosed space

    图  7  半封闭空间内800 g/m3 MgH2粉尘火焰形貌结构

    Figure  7.  Morphological structure of 800 g/m3 MgH2 dust flame in a semi-enclosed space

    图  8  半封闭空间内1000 g/m3 MgH2粉尘火焰形貌结构

    Figure  8.  Morphological structure of 1000 g/m3 MgH2 dust flame in a semi-enclosed space

    图  9  MgH2爆炸火焰结构

    Figure  9.  MgH2 explosive flame structure

    图  10  半封闭空间内不同浓度MgH2粉尘爆炸火焰锋面位置

    Figure  10.  Location of flame fronts of explosion flames with different concentrations of MgH2 dust in a semi-enclosed space

    图  11  半封闭空间内不同浓度MgH2粉尘爆炸火焰锋面瞬时速度

    Figure  11.  Instantaneous velocity of flame fronts of explosion flames of different concentrations of MgH2 dust in a semi-enclosed space

    图  12  MgH2爆炸产物XRD图

    Figure  12.  XRD diagram of MgH2 explosive products

    图  13  MgH2燃烧反应机理

    Figure  13.  Combustion reaction mechanism of MgH2

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  • 收稿日期:  2023-10-08
  • 修回日期:  2024-03-05
  • 网络出版日期:  2024-03-05

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