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CF3I和CO2抑制甲烷-空气爆炸实验研究

程方明 南凡 肖旸 罗振敏 牛巧霞

程方明, 南凡, 肖旸, 罗振敏, 牛巧霞. CF3I和CO2抑制甲烷-空气爆炸实验研究[J]. 爆炸与冲击, 2022, 42(6): 065402. doi: 10.11883/bzycj-2021-0386
引用本文: 程方明, 南凡, 肖旸, 罗振敏, 牛巧霞. CF3I和CO2抑制甲烷-空气爆炸实验研究[J]. 爆炸与冲击, 2022, 42(6): 065402. doi: 10.11883/bzycj-2021-0386
CHENG Fangming, NAN Fan, XIAO Yang, LUO Zhenmin, NIU Qiaoxia. Experimental study on the suppression of methane-air explosion by CF3I and CO2[J]. Explosion And Shock Waves, 2022, 42(6): 065402. doi: 10.11883/bzycj-2021-0386
Citation: CHENG Fangming, NAN Fan, XIAO Yang, LUO Zhenmin, NIU Qiaoxia. Experimental study on the suppression of methane-air explosion by CF3I and CO2[J]. Explosion And Shock Waves, 2022, 42(6): 065402. doi: 10.11883/bzycj-2021-0386

CF3I和CO2抑制甲烷-空气爆炸实验研究

doi: 10.11883/bzycj-2021-0386
基金项目: 国家自然科学基金(52174200);国家重点研发计划(2021YFB4000905)
详细信息
    作者简介:

    程方明(1982- ),男,博士,副教授,chengfm@xust.edu.cn

    通讯作者:

    南 凡(1993- ),男,博士研究生,1538478605@qq.com

  • 中图分类号: O381; X932

Experimental study on the suppression of methane-air explosion by CF3I and CO2

  • 摘要: 为了探究三氟碘甲烷CF3I和二氧化碳CO2复合使用对甲烷爆炸的抑制效果,采用容积为20 L的球形爆炸实验装置,研究了单独和复合使用三氟碘甲烷和二氧化碳对甲烷爆炸压力特性的影响。研究结果表明:添加三氟碘甲烷和二氧化碳后,甲烷爆炸极限范围逐渐缩小,且三氟碘甲烷对甲烷爆炸极限的影响更显著,当三氟碘甲烷和二氧化碳的体积分数分别达到5.5%和32.0%时,甲烷爆炸上下限重合,临界氧的体积分数分别为17.85%和12.50%。可见三氟碘甲烷对甲烷爆炸极限的影响机制与二氧化碳不同,并不是通过降氧为主而发挥抑制作用的。三氟碘甲烷对甲烷爆炸的抑制效果明显优于二氧化碳,对比体积分数为9.5%的甲烷爆炸最大爆炸压力和最大爆炸压力上升速率下降的比率,5.0%三氟碘甲烷的抑爆效果约是等量二氧化碳的6倍和5倍。二氧化碳掺混少量三氟碘甲烷后,抑爆效果大幅提升,掺混比例越,高效果越明显,且对抑制甲烷爆炸压力作用的提升更显著。三氟碘甲烷掺混体积分数大于等于1.0%时,二氧化碳单位增量导致甲烷最大爆炸压力下降的幅度有所增加。这说明三氟碘甲烷的加入具有改善抑爆效果和增强抑爆效率的双重作用。
  • 图  1  实验装置

    Figure  1.  The experimental device

    图  2  CF3I和CO2对CH4爆炸极限的影响

    Figure  2.  Effect of CF3I and CO2 on the explosion limit of CH4

    图  3  CF3I和CO2的比定容热容

    Figure  3.  Specific heat capacity at constant volume of CF3I and CO2

    图  4  CF3I和CO2对CH4爆炸压力曲线的影响

    Figure  4.  Effect of CF3I and CH4 on methane explosion pressure curve

    图  5  CF3I和CO2对CH4爆炸压力参数的影响

    Figure  5.  Effects of CF3I and CO2 on the pressure parameters of CH4 explosion

    图  6  复合抑爆剂对9.5%的CH4爆炸压力参数的影响

    Figure  6.  Effect of compound explosion suppressor on explosion pressure parameters of 9.5% CH4

    表  1  实验工况

    Table  1.   Experimental conditions

    编号工况编号工况 编号工况
    19.5%CH4119.5%CH4+15.0%CO2229.5%CH4+1.0%CF3I+14.0%CO2
    29.5%CH4+0.5%CF3I129.5%CH4+20.0%CO2239.5%CH4+1.0%CF3I+19.0%CO2
    39.5%CH4+1.0%CF3I139.5%CH4+25.0%CO2249.5%CH4+1.0%CF3I+24.0%CO2
    49.5%CH4+1.5%CF3I149.5%CH4+0.5%CF3I+4.5%CO2259.5%CH4+1.5%CF3I+3.5%CO2
    59.5%CH4+2.0%CF3I159.5%CH4+0.5%CF3I+9.5%CO2269.5%CH4+1.5%CF3I+8.5%CO2
    69.5%CH4+3.0%CF3I169.5%CH4+0.5%CF3I+14.5%CO2279.5%CH4+1.5%CF3I+13.5%CO2
    79.5%CH4+4.0%CF3I179.5%CH4+0.5%CF3I+19.5%CO2289.5%CH4+1.5%CF3I+18.5%CO2
    89.5%CH4+5.0%CF3I189.5%CH4+0.5%CF3I+24.5%CO2299.5%CH4+1.5%CF3I+23.5%CO2
    99.5%CH4+5.0%CO2199.5%CH4+1.0%CF3I+4.0%CO2
    109.5%CH4+10.0%CO2219.5%CH4+1.0%CF3I+9.0%CO2
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  • 收稿日期:  2021-09-15
  • 修回日期:  2022-04-26
  • 网络出版日期:  2022-05-07
  • 刊出日期:  2022-06-24

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