EFFECTS OF FUEL-AIR UNMIXEDNESS ON NOX EMISSIONS

被引：105

作者：

FRIC, TF

机构：

[1] General Electric Corporate Research and Development, Schenectady, NY

来源：

JOURNAL OF PROPULSION AND POWER | 1993年 / 9卷 / 05期

关键词：

Air - Combustors - Exhaust gases - Fluorescence - Fuels - Industrial emissions - Laser applications - Mixing - Mixtures - Nitrogen oxides;

D O I：

10.2514/3.23679

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Unmixedness effects of lean fuel-air mixtures on emissions of nitrogen oxides (NO(x)) are experimentally studied. The objective is to study the relative influence of temporal fuel concentration fluctuations and spatial nonuniformities of mean concentration profiles on NO(x) emissions from lean premixed combustion. The NO2 laser-induced fluorescence (LIF) technique is used to quantify unmixedness levels at the flameholder. Unmixedness data are related to NO(x) emissions measurements from downstream of the flames. The results show that temporal unmixedness contributes significantly to higher NO(x) emissions. It is not sufficient to eliminate only spatial nonuniformities of mean concentration in order to minimize NO(x) emissions from lean premixed combustion.

引用

页码：708 / 713

页数：6

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