Laminar Burning Velocities and Markstein Lengths of 2,5-Dimethylfuran-Air Premixed Flames at Elevated Temperatures

Laminar Burning Velocities and Markstein Lengths of 2,5-Dimethylfuran-Air Premixed Flames at Elevated Temperatures
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高温下 2,5-二甲基呋喃-空气预混火焰的层流燃烧速度和马克斯坦长度

DOI:
10.1080/00102202.2010.516037
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发表时间:
2010-12
影响因子:
1.9
通讯作者:
Huang, Zuohua
Huang, Zuohua
中科院分区:
工程技术4区
文献类型:
--
作者:
Wang, Xiangang;Jin, Chun;Wei, Lixia;Wu, Xuesong;Huang, Zuohua

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利用定容燃烧室和高速纹影成像系统,测量了不同初始温度和当量比下2,5-二甲基呋喃(DMF)-空气预混物的层流燃烧速度和Markstein长度。结果表明,未拉伸火焰传播速度和层流燃烧速度均在当量比为1.2附近达到峰值,并随初始温度的升高而增大。随着初始温度的升高,未拉伸火焰传播速度峰值向富混合气侧移动,而层流燃烧速度峰值不受初始温度变化的影响。Markstein长度随当量比的增大而减小,随初始温度的增大而增大。根据实验数据,提出了计算2,5-二甲基甲酰胺-空气混合物层流燃烧速度的公式。
Laminar burning velocities and Markstein lengths of 2,5-dimethylfuran (DMF)-air premixed mixtures at different initial temperatures and equivalence ratios were obtained using a constant volume combustion chamber and high-speed schlieren imaging system. The results indicate that both unstretched flame propagation speed and laminar burning velocity peak near the equivalence ratio of 1.2, and increase with increasing initial temperature. The peak unstretched flame propagation speed moves to the rich mixture side as the initial temperature increases, whereas the peak laminar burning velocity is unaffected by the variation of initial temperature. The Markstein length decreases with increasing equivalence ratio and increases with the increasing initial temperature. Based on the experimental data, a formula to calculate the laminar burning velocities of 2,5-DMF-air mixtures is provided.
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