Effect of combustion air dilution by water vapor or nitrogen on NOx emission in a premixed turbulent natural gas flame:: An experimental study
Effect of combustion air dilution by water vapor or nitrogen on NOx emission in a premixed turbulent natural gas flame:: An experimental study
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DOI：
10.1080/00102200500241214
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发表时间：
2006-04-01
影响因子：
1.9
通讯作者：
Kok, JBW
中科院分区：
文献类型：
--
作者：
Landman, MJ;Derksen, MAF;Kok, JBW
研究了稀薄燃烧条件下，水蒸气或氮气稀释燃烧空气对预混湍流天然气火焰中NOx排放的影响。在三种不同的功率/压力设置下，在不同的空气系数下，用干燥空气、水蒸气稀释或燃烧空气的氮气稀释测量NOx浓度。结果表明，在所有情况下，由于燃烧空气被水蒸气和氮气稀释，对于恒定的T-ad，NOx排放量显著减少。结果还表明，水蒸气稀释的还原作用大于氮气稀释的还原作用。因此，可以得出结论，燃烧空气的水蒸气稀释不仅通过降低火焰温度和氧气不足，而且通过化学作用减少预混湍流火焰中的NOx排放。
A study of the effects of combustion air dilution by water vapor or nitrogen on NOx emission in a premixed turbulent natural gas flame was performed for lean conditions. NOx concentrations were measured with dry air, water vapor dilution or nitrogen dilution of the combustion air at varying air factor at three different power/pressure settings. Results showed for all cases a significant reduction in NOx emission as an effect of combustion air dilution by water vapor and nitrogen for constant T-ad. The results also showed that the reducing effect of water vapor dilution is larger than the reducing effect of nitrogen dilution. It is therefore concluded that water vapor dilution of the combustion air not only reduces NOx emission in premixed turbulent flames by lowering flame temperature and oxygen deficiency, but also by chemical action.