C2H4/N2O预混气体的爆轰性能与火焰淬熄特性

李玉艳 蒋榕培 李智鹏 徐森 潘峰 解立峰

李玉艳, 蒋榕培, 李智鹏, 徐森, 潘峰, 解立峰. C2H4/N2O预混气体的爆轰性能与火焰淬熄特性[J]. 高压物理学报, 2020, 34(4): 045201. doi: 10.11858/gywlxb.20190845
引用本文: 李玉艳, 蒋榕培, 李智鹏, 徐森, 潘峰, 解立峰. C2H4/N2O预混气体的爆轰性能与火焰淬熄特性[J]. 高压物理学报, 2020, 34(4): 045201. doi: 10.11858/gywlxb.20190845
LI Yuyan, JIANG Rongpei, LI Zhipeng, XU Sen, PAN Feng, XIE Lifeng. Detonation and Quenching Characteristics of Premixed C2H4/N2O[J]. Chinese Journal of High Pressure Physics, 2020, 34(4): 045201. doi: 10.11858/gywlxb.20190845
Citation: LI Yuyan, JIANG Rongpei, LI Zhipeng, XU Sen, PAN Feng, XIE Lifeng. Detonation and Quenching Characteristics of Premixed C2H4/N2O[J]. Chinese Journal of High Pressure Physics, 2020, 34(4): 045201. doi: 10.11858/gywlxb.20190845

C2H4/N2O预混气体的爆轰性能与火焰淬熄特性

doi: 10.11858/gywlxb.20190845
详细信息
    作者简介:

    李玉艳(1985-),女,博士研究生,主要从事推进剂安全性能研究. E-mail:lyy.piao@163.com

    通讯作者:

    徐 森(1981-),男,博士,副教授,主要从事含能材料研究. E-mail:pfhycc@163.com

  • 中图分类号: O643.2; TJ55

Detonation and Quenching Characteristics of Premixed C2H4/N2O

  • 摘要: 采用自制的燃爆实验装置对C2H4/N2O预混气体的爆轰性能与火焰淬熄特性进行了实验研究。结果表明:在大直径有机玻璃管中预混气体均经历了爆燃转爆轰过程,点火初期火焰速度及加速度在内径为5、10和15 mm的管道中依次减小;预混气体中加入CO2(2.4%,质量分数)后,火焰加速进程明显延缓,点火初期处于稳定燃烧阶段;预混气体的稳定爆速为2 207 m/s,爆压为3.92 MPa,与理论值一致;常压下预混火焰在小直径不锈钢管中的临界淬熄管径为0.5~0.7 mm,预混气体火焰传播速度越大,管径越大,淬熄越困难。依据淬熄管径、湍流火焰速度和淬熄管道长度的关系,可计算防回火管道的有效长度,从而为防回火装置设计提供参考。

     

  • 图  有机玻璃管C4示意图(单位:mm)

    Figure  1.  Schematic of the PMMA channel C4 (Unit:mm)

    图  组合管道示意图(单位:mm)

    Figure  2.  Schematic of the combination channel (Unit:mm)

    图  不同管径管道中火焰阵面传播速度随时间变化曲线

    Figure  3.  Flame speed as a function of time in channels with various diameters

    图  不同管径管道中火焰加速度随时间的变化曲线

    Figure  4.  Flame acceleration as a function of time in channels with various diameters

    图  C1管中C2H4/N2O和C2H4/N2O/CO2的火焰传播速度随时间变化曲线

    Figure  5.  Flame speed of C2H4/N2O and C2H4/N2O/CO2 as a function of time in the channel C1

    图  管道C4中火焰前端速度随时间变化曲线

    Figure  6.  Flame speed as a function of time in the channel C4

    图  管道C4中8个压力传感器记录的压力曲线

    Figure  7.  Pressure profiles versus time obtained by eight pressure gauges in the channel C4

    图  压力峰值变化曲线

    Figure  8.  Plots of maximum overpressure obtained in the channel C4

    图  火焰传播速度、冲击波速度和C-J速度曲线

    Figure  9.  Flame speed, shock wave velocity and C-J velocity curves

    图  10  组合管道中火焰传播实测图像

    Figure  10.  Image of the flame propagation in combination channels

    图  11  组合管道中预混火焰淬熄情况

    Figure  11.  Diagram of the flame behaviors in combination channels

    图  12  加速管长度不同时火焰传播速度随时间变化曲线

    Figure  12.  Flame acceleration process as a function of time in accelerating channels with different lengths

    表  1  有机玻璃管道尺寸

    Table  1.   Geometrical characteristics of PMMA channels

    Channell/mmd/mml/dV/mL
    C1, smooth1 400 5280 27.5
    C2, smooth1 40010140109.9
    C3, smooth1 40015 93247.3
    C4, rough2 00015133112.5
     Note: l is the length of the PMMA channel; d is the inner diameter of the PMMA channel; V is the volume of the channel.
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  • 收稿日期:  2019-12-17
  • 修回日期:  2020-01-05

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