Effect of fuel composition on jet flames in a heated and diluted oxidant stream
Effect of fuel composition on jet flames in a heated and diluted oxidant stream
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DOI：
10.1016/j.combustflame.2012.04.012
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发表时间：
2012-10-01
影响因子：
4.4
通讯作者：
Dally, Bassam B.
中科院分区：
文献类型：
--
作者：
Medwell, Paul R.;Dally, Bassam B.
氢添加对结构的中等或强烈的低氧稀释（MILD）燃烧制度的作用是研究使用相结合的实验技术和层流火焰计算。激光诊断成像是用来同时揭示现场分布的羟基自由基（OH），甲醛（H2CO），和温度使用射流在热气流（JHC）燃烧器。所考虑的燃料是天然气、乙烯和LPG（每种都用氢气按体积比1：1稀释）。为了稳定火焰，有必要在主燃料中加入氢。除了氢在火焰稳定中的作用之外，氢的添加还导致反应区对于不同的主燃料类型表现出类似的结构。反应区结构与氢添加的独立性表明，多种燃料可用于实现温和燃烧。(c)2012燃烧研究所由爱思唯尔公司出版All rights reserved.
The role of hydrogen addition on the structure of the Moderate or Intense Low oxygen Dilution (MILD) combustion regime is examined using a combination of experimental techniques and laminar flame calculations. Laser diagnostic imaging is used to simultaneously reveal the in situ distribution of the hydroxyl radical (OH), formaldehyde (H2CO), and temperature using the Jet in Hot Coflow (JHC) burner. The fuels considered are natural gas, ethylene, and LPG (each diluted with hydrogen 1:1 by volume). Hydrogen addition to the primary fuel was found necessary to stabilise the flames. Further to the role of hydrogen in the stabilisation of the flames, hydrogen addition also leads to the reaction zone exhibiting similar structure for different primary fuel types. The independence of the reaction zone structure with hydrogen addition suggests that a wide variety of fuels may be usable for achieving MILD combustion. (c) 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved.