A comparison of the thermal and emission characteristics of co and counter swirl inverse diffusion flames
A comparison of the thermal and emission characteristics of co and counter swirl inverse diffusion flames
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DOI：
10.1016/j.ijthermalsci.2016.06.015
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发表时间：
2016-11-01
影响因子：
4.5
通讯作者：
Saad, Hany
中科院分区：
文献类型：
--
作者：
Kotb, Ashraf;Saad, Hany
在这项工作中，使用液化石油气 (LPG) 研究了同旋和逆旋燃烧器对逆扩散火焰 (IDF) 特性的影响。比较了同向和反向 IDF 的火焰形状。旋流 IDF 燃烧器的空气和燃料射流之间的动量交换会影响产生的火焰长度和稳定性。结果分析表明，同旋IDF比逆旋IDF更短、更稳定。研究了空气射流雷诺数 (Re) 以及一次当量比 (Phi) 对火焰中心线温度和废气排放的影响。结果表明，对于本研究中使用的所有 Phi 值，同旋 IDF 的中心线温度分布均高于逆旋 IDF 的中心线温度分布。对两个旋流燃烧器进行了 CO 和 NOx 排放量比较。结果发现，Re和旋流方向是减少CO排放的两个关键因素。这项研究表明，使用同旋 IDF 可以减少 CO 排放。 (C) 2016 Elsevier Masson SAS。版权所有。
In this work the influence of co-swirl and counter-swirl burners on the inverse diffusion flame (IDF) characteristics has been studied using liquefied petroleum gas (LPG). The flame shape of the co and counter IDFs were compared. The momentum exchange between the air and fuel jets for swirled IDF burners effects on the produced flame length and stability. The analysis of the results showed that the co swirling IDF is shorter and more stable than the counter swirling one. The influence of the air jet Reynolds number (Re) consequently the primary equivalence ratio (Phi) on the flame centerline temperature and exhaust gas emissions were examined. The results showed that for the co swirling IDF the centerline temperature profile is higher than the centerline temperature profile of the counter swirl IDF for all values of Phi used in this study. The CO and NOx emissions comparison were made for the two swirled burners. It was found that Re and swirl directions are two key factors for reducing CO emissions. This study indicates that the CO emission is decreased by using co-swirl IDF. (C) 2016 Elsevier Masson SAS. All rights reserved.