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首页> 外文期刊>Combustion and Flame >Laminar burning velocities and flame instabilities of 2,5-dimethylfuran-air mixtures at elevated pressures
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Laminar burning velocities and flame instabilities of 2,5-dimethylfuran-air mixtures at elevated pressures

机译：2,5-二甲基呋喃-空气混合物在高压下的层流燃烧速度和火焰不稳定性

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摘要

An experimental investigation on laminar burning velocities and onset of flame instabilities on spherically expanding flames in 2,5-dimethylfuran-air mixtures at elevated pressures was conducted over a wide range of equivalence ratios. The laminar burning velocities, laminar burning fluxes and Markstein lengths at different equivalence ratios and initial pressures were obtained. Furthermore, the diffusional-thermal and hydrodynamic effects on flame front instabilities were specified, and the onset of cellularity was reported. Results show that laminar burning velocities are decreased with increasing initial pressure due to the increase of the free-stream density and the progressively more important three-body termination reactions. With increasing initial pressure, Markstein length decrease, while the laminar burning flux increases. Onsets of flame instabilities, expressed in terms of critical radius or Peclet number, were found to be promoted with increasing equivalence ratio and initial pressures, due to the combined effects of diffusional-thermal and hydrodynamic instabilities.
机译：在较宽的当量比范围内，对高压下的2,5-二甲基呋喃-空气混合物中的层状燃烧速度和球形膨胀火焰的火焰不稳定性开始进行了实验研究。获得了不同当量比和初始压力下的层流燃烧速度，层流燃烧通量和马克斯坦长度。此外，还指出了扩散热和流体动力学对火焰前缘不稳定性的影响，并报道了蜂窝状的开始。结果表明，层流燃烧速度随着初始压力的增加而降低，这归因于自由流密度的增加和越来越重要的三体终止反应。随着初始压力的增加，马克斯坦长度减小，而层流燃烧通量增加。发现由于临界热扩散和流体动力不稳定性的共同作用，以临界半径或佩克雷特数表示的火焰不稳定性的发作随着当量比和初始压力的增加而增加。

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  • 来源
    《Combustion and Flame》 |2011年第3期|p.539-546|共8页
  • 作者

    Xuesong Wu; Zuohua Huang; Xiangang Wang; Chun Jin; Chenlong Tang; Lixia Wei; Chung K. Law;

  • 作者单位

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    Dept. of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 085405263, USA;

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

    2,5-dimethylfuran; laminar burning characteristics; flame instabilities; elevated pressures;

    机译：2,5-二甲基呋喃;层流燃烧特性火焰不稳定;高压;

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