The turbulent burning velocity of methanol–air mixtures
The turbulent burning velocity of methanol–air mixtures
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DOI：
10.1016/j.fuel.2014.04.003
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发表时间：
2014-08
期刊：
影响因子：
7.4
通讯作者：
Jeroen Vancoillie;G. Sharpe;M. Lawes;S. Verhelst
中科院分区：
文献类型：
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作者：
Jeroen Vancoillie;G. Sharpe;M. Lawes;S. Verhelst
甲醇是火花点火发动机和其他燃烧应用的可持续和多功能替代燃料。为了表征这种燃料的燃烧行为，需要很好地理解影响其湍流燃烧速度的因素。本文给出了在风扇搅拌弹中，在u′= 2-6 m/s，ε = 0.8-1.4，T= 358 K，压力达0.5 MPa的条件下，甲醇-空气混合物湍流燃烧速度的实验值。结合层流燃烧速度值先前获得的同一台钻机，这些测量用于提供更好的洞察到各种因素影响的甲醇吨，并评估现有的湍流燃烧模型在何种程度上可以重现实验趋势。看来大多数模型正确地考虑了湍流均方根速度u′的影响。然而，关于温度和压力的影响，通过包含取决于热扩散混合物性质和压力的模型项，考虑火焰拉伸和不稳定性的模型在更简单的配方上具有轻微的优势。
Methanol is a sustainable and versatile alternative fuel for spark-ignition engines and other combustion applications. To characterize the combustion behavior of this fuel, a good understanding of the factors affecting its turbulent burning velocity is required. This paper presents experimental values of the turbulent burning velocity of methanol-air mixtures obtained in a fan-stirred bomb, for u′= 2–6 m/s, ϕ= 0.8–1.4, T= 358 K and pressures up to 0.5 MPa. In combination with laminar burning velocity values previously obtained on the same rig, these measurements are used to provide better insight into the various factors affecting u t of methanol, and to assess to what degree existing turbulent combustion models can reproduce experimental trends. It appeared that most models correctly accounted for the effects of turbulent rms velocity u′. With respect to the effects of ϕ and pressure, however, models accounting for flame stretch and instabilities, through the inclusion of model terms depending on thermodiffusive mixture properties and pressure, had a slight edge on simpler formulations.