Comparison of Different Gasoline Alternative Fuels in Terms of Laminar Burning Velocity at Increased Gas Temperatures and Exhaust Gas Recirculation Rates
Comparison of Different Gasoline Alternative Fuels in Terms of Laminar Burning Velocity at Increased Gas Temperatures and Exhaust Gas Recirculation Rates
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DOI：
10.1021/ef4021922
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发表时间：
2014-02-01
期刊：
影响因子：
5.3
通讯作者：
Wensing, Michael
中科院分区：
文献类型：
--
作者：
Knorsch, Tobias;Zackel, Andreas;Wensing, Michael
丁醇异构体正丁醇和异丁醇以及乙醇是最有可能用于发动机燃烧的生物燃料，并且在未来作为替代燃料或混合组分可能变得更加重要。为了利用替代燃料的潜力，应该了解燃烧机制以及燃烧行为。火焰动力学研究和燃烧模拟的一个关键参数是层流燃烧速度。然而，气化液体燃料的火焰速度的可重复测量是困难的。为了将实验结果的分散性降低到可接受的水平，几个欧洲研究机构对使用所谓的热流燃烧器有共同的研究兴趣。在这项工作中，自行设计的液体燃料蒸发系统与精确的液滴发生器相结合，可以测量高温下的绝热层流燃烧速度。一维 (1D) 火焰看起来非常稳定，甚至接近其可燃极限。选择边界条件来模拟不同温度和混合物成分的废气再循环 (EGR)。将测量数据与其他研究组的相应结果进行比较，并对燃烧速度的不确定度进行估计。
The butanol isomers n-butanol and isobutanol as well as ethanol are among the biofuels most likely to be used for engine combustion and are likely to become more relevant as surrogate fuels or blend components in the future. To use the potentials of alternative fuels, the combustion mechanisms and, thus, burning behavior should be known. A key parameter for flame kinetic studies and combustion simulation is the laminar burning velocity. However, reproducible measurements of flame speeds of gasified liquid fuels are difficult. To reduce the scattering of experimental results to acceptable levels, there is a common research interest of several European institutes using so-called heat flux burners. In this work, a self-designed liquid fuel evaporation system has been combined with a precise droplet generator, which allows for measurements of adiabatic laminar burning velocity at elevated gas temperatures. The one-dimensional (1D) flame appears very stable, even close to its flammability limits. The boundary conditions are chosen to model exhaust gas recirculation (EGR) with different temperatures and compositions of the mixtures. The measurement data are compared to the corresponding results of other research groups, and the uncertainty of the burning velocity is estimated.