Ignition and Flame Speed Kinetics of Two Natural Gas Blends With High Levels of Heavier Hydrocarbons
Ignition and Flame Speed Kinetics of Two Natural Gas Blends With High Levels of Heavier Hydrocarbons
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DOI：
10.1115/1.3124665
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发表时间：
2010-02-01
影响因子：
1.5
通讯作者：
Petersen, Eric
中科院分区：
文献类型：
--
作者：
Bourque, Gilles;Healy, Darren;Petersen, Eric
进行高压实验和化学动力学建模，以生成数据库和化学动力学模型，该模型可以表征含有显著水平的重质烃（高达37.5%体积）的甲烷基燃料混合物的燃烧化学。点火延迟时间是在两种不同的激波管和快速压缩机中测量的，压力高达34 atm，温度从740 K到1660 K。层流火焰速度也测量压力高达4个大气压下使用的高压容器与光学访问。两种不同的燃料混合物含有乙烷，丙烷，正丁烷，正戊烷添加到甲烷进行了研究，当量比从贫（0.3）到富（2.0）。本文介绍了最全面的一套实验点火和层流火焰速度数据在公开文献中的CH 4/C2 H6/C3 H8/C4 H10/C5 H12燃料混合物与显着水平的C2 +烃。使用这些数据，一个详细的化学动力学模型的基础上，目前和最近的工作，作者编译和完善。该模型的预测是非常好的点火延迟时间的整个范围内，考虑到事实上，数据集是如此彻底。尽管如此，仍然可以在最低温度下的点火时间和在1个大气压以上的压力下和在富燃条件下的层流火焰速度方面对模型进行一些改进。[DOI：10.1115/1.3124665]
High-pressure experiments and chemical kinetics modeling were performed to generate a database and a chemical kinetic model that can characterize the combustion chemistry of methane-based fuel blends containing significant levels of heavy hydrocarbons (up to 37.5% by volume). Ignition delay times were measured in two different shock tubes and in a rapid compression machine at pressures up to 34 atm and temperatures from 740 K to 1660 K. Laminar flame speeds were also measured at pressures up to 4 atm using a high-pressure vessel with optical access. Two different fuel blends containing ethane, propane, n-butane, and n-pentane added to methane were studied at equivalence ratios varying from lean (0.3) to rich (2.0). This paper represents the most comprehensive set of experimental ignition and laminar flame speed data available in the open literature for CH4/C2H6/C3H8/C4H10/C5H12 fuel blends with significant levels of C2 + hydrocarbons. Using these data, a detailed chemical kinetics model based on current and recent work by the authors was compiled and refined. The predictions of the model are very good over the entire range of ignition delay times, considering the fact that the data set is so thorough. Nonetheless, some improvements to the model can still be made with respect to ignition times at the lowest temperatures and for the laminar flame speeds at pressures above 1 atm and at rich conditions. [DOI: 10.1115/1.3124665]