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正庚烷/空气混合气最小点火能量及其影响因素

张驰 钟北京 郑东

张驰, 钟北京, 郑东. 正庚烷/空气混合气最小点火能量及其影响因素[J]. 航空动力学报, 2018, 33(2): 456-462. doi: 10.13224/j.cnki.jasp.2018.02.024
引用本文: 张驰, 钟北京, 郑东. 正庚烷/空气混合气最小点火能量及其影响因素[J]. 航空动力学报, 2018, 33(2): 456-462. doi: 10.13224/j.cnki.jasp.2018.02.024
Minimum ignition energy of n-heptane/air mixtures and its affecting factors[J]. Journal of Aerospace Power, 2018, 33(2): 456-462. doi: 10.13224/j.cnki.jasp.2018.02.024
Citation: Minimum ignition energy of n-heptane/air mixtures and its affecting factors[J]. Journal of Aerospace Power, 2018, 33(2): 456-462. doi: 10.13224/j.cnki.jasp.2018.02.024

正庚烷/空气混合气最小点火能量及其影响因素

doi: 10.13224/j.cnki.jasp.2018.02.024
基金项目: 国家自然科学基金(91441113)

Minimum ignition energy of n-heptane/air mixtures and its affecting factors

  • 摘要: 利用定容弹燃烧系统对正庚烷/空气混合气的最小点火能量进行了实验测量,获得了不同初始条件下正庚烷/空气混合气的最小电火花点火能量。实验结果表明:正庚烷/空气混合气的最小点火能量随当量比的增大先减小后增大。对于初始压力为0.1MPa和初始温度为450K的混合气,最小点火能量在当量比1.1附近达到最小值,为0.3904mJ。实验发现:正庚烷/空气预混气的初始压力和初始温度对最小点火能量有重要的影响,与对火焰传播速度的影响是一致的。分析表明,初始温度和初始压力无论是对最小点火能量还是对火焰传播速度的影响,都与混合气的化学反应速率密切相关,化学反应速率越快,火焰传播速度越大,最小点火能量越小。

     

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出版历程
  • 收稿日期:  2016-06-21
  • 刊出日期:  2018-02-28

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