| 稀释燃烧的火焰稳定性 |
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| 引用本文： | 刘玉英,BAUER Philippe,杨茂林.稀释燃烧的火焰稳定性[J].燃烧科学与技术,2009,15(2). |
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| 作者姓名： | 刘玉英 BAUER Philippe 杨茂林 |
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| 作者单位： | 1. 北京航空航天大学能源与动力工程学院,北京,100083
2. 法国国家科学研究中心燃烧与爆炸实验室,普瓦捷,86961,法国 |
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| 摘 要： | 采用实验研究的方法探讨了反应物预热温度与稀释率两个因素对稀释燃烧火焰稳定性的影响.实验以氮气稀释的甲烷-空气对冲扩散火焰为研究对象,确定了不同反应物预热温度与氧化剂稀释率(氧气体积分数)时火焰的熄火极限,结果表明,增大反应物预热温度拓宽了火焰稳定燃烧区域,而增加氧化剂稀释率(降低氧气体积分数)会降低稀释火焰的稳定性,二者对火焰稳定性的影响作用相反.为了进一步分析反应物预热温度与稀释率对火焰稳定性的影响程度,引入了估算的Damkohler数,分析表明,在实验研究范围内,反应物预热温度对火焰稳定性的影响比稀释率的影响显著,是火焰稳定性的主要影响因素.
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| 关 键 词： | 对冲火焰 稀释燃烧 稳定性 熄火极限 |
Flame Stability of Diluted Combustion |
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| LIU Yu-ying,MOST Jean-Michel,BAUER Philippe,YANG Mao-lin.Flame Stability of Diluted Combustion[J].Journal of Combustion Science and Technology,2009,15(2). |
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| Authors: | LIU Yu-ying MOST Jean-Michel BAUER Philippe YANG Mao-lin |
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| Affiliation: | 1.School of Jet Propulsion;Beihang University;Beijing 100083;China;2.Laboratoire de Combustion et de Détonique;Futuroscope 86961;France |
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| Abstract: | The effects of preheat temperature of reactants and dilution rate of oxidizer(or oxygen concentration) on flame stability of diluted combustion,which was established in a(CH4+N2)/(Air+N2) counter flow burner,were investigated in this paper.Flame stability was studied by determining extinction limits on various preheat temperature level and dilution rate.It was shown that stable combustion domain of flame was expanded with the increasing of preheat temperature,but high dilution rate of oxidizer decreased fla... |
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| Keywords: | counter flow flame diluted combustion stability extinction limit |
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