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Laminar flame speeds and extinction limits of conventional and alternative jet fuels

机译：常规和代用喷气燃料的层流火焰速度和熄灭极​​限

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摘要

Experimental results of laminar flame speeds and extinction stretch rates for the conventional (Jet-A) and alternative (S-8) jet fuels are acquired and compared to the results from our earlier studies for neat hydrocarbon surrogate components, including n-decane and n-dodecane. Specifically, atmospheric pressure laminar flame speeds are measured using a counterflow twin-flame configuration for Jet-A/O_2/N_2 and S-8/O_2/N_2 mixtures at preheat temperatures of 400, 450, and 470 K and equivalence ratios ranging from 0.7 to 1.4. The flow field is recorded using digital particle image velocimetry. Linear extrapolation is then applied to determine the unstretched laminar flame speed. Experimental data for the extinction stretch rates of the nitrogen diluted jet fuel/oxidizer mixtures as a function of equivalence ratio are also obtained. In addition, the experimental data of jet-A are compared to the computed values using a chemical kinetic mechanism for a kerosene surrogate reported in literature. A sensitivity analysis is further performed to identify the key reactions affecting the laminar flame speed and extinction stretch rate for this kerosene surrogate.
机译：获得了常规（Jet-A）和替代（S-8）喷气燃料的层流火焰速度和消光拉伸速率的实验结果，并将其与我们之前对纯正烃替代物（包括正癸烷和正构烷烃）的研究结果进行了比较。 -十二烷。具体来说，对于Jet-A / O_2 / N_2和S-8 / O_2 / N_2混合物，在400、450和470 K的预热温度下，使用逆流双火焰配置测量大气压层流火焰速度，当量比为0.7至1.4。使用数字粒子图像测速仪记录流场。然后应用线性外推法确定未拉伸的层流火焰速度。还获得了氮稀释的喷气燃料/氧化剂混合物的消光拉伸速率随当量比变化的实验数据。另外，使用文献中报道的煤油替代物的化学动力学机理将jet-A的实验数据与计算值进行比较。进一步进行敏感性分析，以确定影响该煤油替代物的层流火焰速度和消光拉伸速率的关键反应。

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  • 来源
    《Fuel》 |2011年第3期|p.1004-1011|共8页
  • 作者

    Kamal Kumar; Chih-Jen Sung; Xin Hui;

  • 作者单位

    Department of Mechanical Engineering, University of Connecticut. Storrs. CT 06269. United States;

    Department of Mechanical Engineering, University of Connecticut. Storrs. CT 06269. United States;

    Department of Mechanical and Aerospace Engineering. Case Western Reserve University, Cleveland, OH 44106, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    jet fuels; alternative fuels; laminar flame speed; extinction stretch rate;

    机译：喷气燃料;替代燃料;层焰速度;消光拉伸率;

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