Reaction zone visualisation in swirling spray n-heptane flames
Reaction zone visualisation in swirling spray n-heptane flames
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DOI：
10.1016/j.proci.2014.06.012
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发表时间：
2015-01-01
影响因子：
3.4
通讯作者：
Mastorakos, E.
中科院分区：
文献类型：
--
作者：
Yuan, R.;Kariuki, J.;Mastorakos, E.
联合PLIF测量CH2O和OH进行了旋流稳定的正庚烷喷雾火焰在接近灭绝的条件下。层流逆流庚烷火焰在不同的应变率的模拟表明，热释放可以近似表示的产品CH 2O x OH，但也不能可视化的化学计量的贫侧的热释放。模拟表明，PLIF图像中的CH2O区域的轮廓可以是化学计量混合物分数等值线的近似指标。由于强烈的湍流和局部消光，单个PLIF图像显示出非常可变的行为。它们表明富区，反应片断裂，升空，他们认为，这种火焰主要是非预混字符。这里表示的平均热释放速率与逆阿贝尔变换的OH * 化学发光成像一致。这种技术的喷雾火焰的有用性进行了讨论。(C)2014燃烧研究所爱思唯尔公司出版All rights reserved.
Joint PLIF measurements of CH2O and OH were performed in a swirl-stabilized n-heptane spray flame at conditions close to extinction. Simulations of laminar counterflow heptane flames at different strain rates showed that the heat release could be approximately represented by the product CH2O x OH, but also that this product cannot visualise the heat release at the lean side of stoichiometry. The simulations suggest that the outline of CH2O regions in PLIF images could be an approximate indicator of the stoichiometric mixture fraction iso-line. Due to the intense turbulence and local extinction, individual PLIF images show a very variable behaviour. They indicate rich zones, reaction sheet breaks, lift-off, and they suggest that this flame is mostly of non-premixed character. The mean heat release rate as represented here is consistent with inverse Abel-transformed OH* chemiluminescence imaging. The usefulness of this technique for spray flames is discussed. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.