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不同稀释气体下等离子体辅助甲烷点火

沈双晏 金星 邓同晔

沈双晏, 金星, 邓同晔等 . 不同稀释气体下等离子体辅助甲烷点火[J]. 北京航空航天大学学报, 2017, 43(7): 1373-1379. doi: 10.13700/j.bh.1001-5965.2016.0544
引用本文: 沈双晏, 金星, 邓同晔等 . 不同稀释气体下等离子体辅助甲烷点火[J]. 北京航空航天大学学报, 2017, 43(7): 1373-1379. doi: 10.13700/j.bh.1001-5965.2016.0544
SHEN Shuangyan, JIN Xing, DENG Tongyeet al. Plasma assisted methane ignition under different diluent gas[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1373-1379. doi: 10.13700/j.bh.1001-5965.2016.0544(in Chinese)
Citation: SHEN Shuangyan, JIN Xing, DENG Tongyeet al. Plasma assisted methane ignition under different diluent gas[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1373-1379. doi: 10.13700/j.bh.1001-5965.2016.0544(in Chinese)

不同稀释气体下等离子体辅助甲烷点火

doi: 10.13700/j.bh.1001-5965.2016.0544
基金项目: 

国家自然科学基金 11372356

详细信息
    作者简介:

    沈双晏  男, 博士研究生。主要研究方向:等离子体辅助点火与助燃

    金星  男, 博士, 研究员, 博士生导师。主要研究方向:先进推进技术

    通讯作者:

    金星, E-mail:jinxing_beijing@sina.com

  • 中图分类号: V231.2+4;O539

Plasma assisted methane ignition under different diluent gas

Funds: 

National Natural Science Foundation of China 11372356

More Information
  • 摘要:

    等离子体由于可以同时在燃料反应中增加化学效应与热效应,有望成为辅助点火的有效技术途径。构建了基于激波管的等离子体辅助甲烷点火实验系统,测量了甲烷自点火、持续放电以及放电后断电条件下的点火延迟时间,分析了不同稀释气体下等离子体对甲烷点火延迟的缩短效果。构建了等离子体发射光谱测量系统,测量了放电单元中的发射光谱。在实验条件下,点火温度越高,持续放电下活性粒子的浓度越高。较小的放电功率( < 4 W)即可将甲烷的点火延迟时间缩短30%~95%。稀释气体为Ar时,等离子体在点火温度小于1 000 K或大于1 400 K时对甲烷点火延迟时间缩短作用更好。稀释气体为N2时,随着点火温度的升高,等离子体对甲烷点火延迟时间作用效果随之降低。

     

  • 图 1  实验系统示意图

    Figure 1.  Schematic diagram of experimental system

    图 2  发射光谱测量示意图

    Figure 2.  Schematic diagram of emission spectrum measurement

    图 3  稀释气体为Ar下不同当量比的实验结果

    Figure 3.  Experimental results of diluent gas Ar with different equivalent ratios

    图 4  稀释气体为N2下不同当量比的实验结果

    Figure 4.  Experimental results of diluent gas N2 with different equivalent ratios

    图 5  不同压强下CH4/O2/Ar混合气体的发射光谱

    Figure 5.  Mixed CH4/O2/Ar gas emission spectrum under different pressure

    图 6  不同压强下CH4/O2/N2混合气体的发射光谱

    Figure 6.  Mixed CH4/O2/ N2 gas emission spectrum under different pressure

    图 7  不同点火温度下等离子体对甲烷点火延迟时间的缩短效果

    Figure 7.  Shortening effect of plasma on methane ignition delay time under different ignition temperature

    表  1  当量比为1的不同稀释气体甲烷点火延迟时间拟合对比

    Table  1.   Fitting comparison of methane ignition delay time of equivalent ratio equals to 1 under different diluent gas

    稀释气体 拟合参数 拟合值 拟合确定系数
    Ar a -3.8221 0.9785
    b 5.2165
    N2 a -1.5697 0.9175
    b 2.9495
    下载: 导出CSV

    表  2  当量比为1的不同稀释气体在持续放电条件下甲烷点火延迟时间拟合对比

    Table  2.   Fitting comparison of methane ignition delay time of equivalent ratio equals to 1 in different diluent gas under continuous discharge

    稀释气体 拟合线型 拟合曲线
    Ar 二次函数 ln τ=-14.279 56+25.365 9(1000/T)-10.9474(1000/T)2
    N2 一次函数 ln τ=-2.6947+4.6531(1000/T)
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-06-23
  • 录用日期:  2016-10-14
  • 刊出日期:  2017-07-20

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