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外加磁场对乙炔气体爆炸反应影响研究

高建村 杨喜港 胡守涛 洪子金 王乐 李如霞 夏艺萌 孙谞

高建村, 杨喜港, 胡守涛, 洪子金, 王乐, 李如霞, 夏艺萌, 孙谞. 外加磁场对乙炔气体爆炸反应影响研究[J]. 爆炸与冲击. doi: 10.11883/bzycj-2021-0417
引用本文: 高建村, 杨喜港, 胡守涛, 洪子金, 王乐, 李如霞, 夏艺萌, 孙谞. 外加磁场对乙炔气体爆炸反应影响研究[J]. 爆炸与冲击. doi: 10.11883/bzycj-2021-0417
GAO Jiancun, YANG Xigang, HU Shoutao, HONG Zijin, WANG Le, LI Ruxia, XIA Yimeng, SUN Xu. Effect of external magnetic field on free radicals reaction of gas explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2021-0417
Citation: GAO Jiancun, YANG Xigang, HU Shoutao, HONG Zijin, WANG Le, LI Ruxia, XIA Yimeng, SUN Xu. Effect of external magnetic field on free radicals reaction of gas explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2021-0417

外加磁场对乙炔气体爆炸反应影响研究

doi: 10.11883/bzycj-2021-0417
基金项目: 北京市教委科技计划项目(KM201910017001);北京市自然科学基金青年项目(2214071)
详细信息
    作者简介:

    高建村(1964- ),男,博士,教授,gaojiancun@bipt.edu.cn

    通讯作者:

    胡守涛(1986- ),男,博士,讲师,hushoutao@bipt.edu.cn

  • 中图分类号: O389

Effect of external magnetic field on free radicals reaction of gas explosion

  • 摘要: 为探究磁场对气体爆炸反应的影响,实验研究了磁场强度对C2H2爆炸特征的影响规律,结果表明:磁场能抑制C2H2爆炸压力和升压速率,磁场强度越大,抑制效果越明显;沿火焰传播方向,磁场对C2H2爆炸火焰传播速度呈现先促进后抑制的效果,整体表现为抑制作用。磁场强度较低时,爆炸火焰平均传播速度降低了38.94%,磁场强度较高时,爆炸火焰平均传播速度降低了49.62%。利用Chemkin-Pro软件模拟了C2H2爆炸基元反应过程,理论推导了磁场影响C2H2爆炸的反应机理,磁场改变了C2H2爆炸反应路径,是造成爆炸特征参数下降的主要原因。由于不同种类自由基的摩尔质量和磁化强度不同,在磁场中,洛伦兹力和梯度磁场力对小分子量自由基比对大分子量自由基的作用力更大。磁场改变了自由基的运动轨迹,由于同种小分子量自由基的聚集和器壁效应的产生,减小了关键自由基之间的碰撞几率,降低了基元反应的速率,导致爆炸强度下降。
  • 图  1  电磁场下预混气体爆炸实验装置示意图

    Figure  1.  Schematic of gas explosion experiment device under electromagnetic field

    图  2  不同磁场强度下乙炔/空气爆炸压力

    Figure  2.  Explosion pressure of C2H2/air under different magnetic fields strengths

    图  3  平均压力上升速率和最大压力对比图

    Figure  3.  Average pressure rise rate and maximum explosion pressure

    图  4  乙炔/空气爆炸火焰传播速度和平均传播速度

    Figure  4.  Flame propagation velocity and average propagation velocityof C2H2/air explosion

    图  5  C2H2的生成速率分析

    Figure  5.  Rate of product analysis of C2H2

    图  6  C2H2敏感性分析

    Figure  6.  Sensitivity analysis of C2H2

    图  7  有无磁场时C2H2生成CO的反应路径变化

    Figure  7.  Changes in reaction pathto produce CO from C2H2 due tomagnetic field

    图  8  有无磁场时C2H2生成H2O的反应路径变化

    Figure  8.  Changes inreaction path to produce H2O from C2H2 due to magnetic field

    表  1  无磁场时乙炔/空气爆炸火焰传播速度

    Table  1.   Flame propagation velocity ofC2H2/air explosion without a magnetic field

    实验光纤传感器距离/mm时间/μs速度/(m·s−1)平均速度/(m·s−1)
    11~23009945.9330.1681.64
    2~33002253.58133.12
    21~23009893.2730.3280.97
    2~33002279.23131.62
    31~23009369.1432.0298.51
    2~33001818.18165.00
    下载: 导出CSV

    表  2  较低磁场强度下乙炔/空气爆炸火焰传播速度参照表1修改

    Table  2.   Flame propagation velocity of C2H2/air explosion under lower magnetic field strength

    实验光纤传感器距离/mm时间/μs速度/(m·s−1)平均速度/(m·s−1)
    11~23007955.4537.7153.02
    2~33004390.4668.33
    21~23007874.0238.1052.80
    2~33004444.2667.50
    31~23008002.1337.4953.64
    2~33004298.6169.79
    下载: 导出CSV

    表  3  较高磁场强度下乙炔/空气爆炸火焰传播速度参照表1修改

    Table  3.   Flame propagation velocity of C2H2/air explosion under higher magnetic field strength

    实验光纤传感器距离/mm时间/μs速度/(m·s−1)平均速度/(m·s−1)
    11~23004917.2361.0141.81
    2~330013269.0722.61
    21~23004705.8863.7543.88
    2~330012494.1524.01
    31~23004558.5865.8145.86
    2~330011577.7025.91
    下载: 导出CSV

    表  4  起始参数

    Table  4.   Initial parameters

    C2H2体积分数/%N2体积分数/%O2体积分数/%温度/K压力/kPa时间/s
    7.772.91719.38312001010.05
    下载: 导出CSV
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  • 收稿日期:  2021-10-08
  • 修回日期:  2022-02-12
  • 网络出版日期:  2022-03-29

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