Investigation of the impact of biodiesel fuelling on NOx emissions using an optical direct injection diesel engine

被引：159

作者：

Cheng, A.S. ^{[1
,3
]}

Upatnieks, A. ^{[2
]}

Mueller, C.J. ^{[2
]}

机构：

[1] School of Engineering, San Francisco State University, San Francisco, CA

[2] Combustion Research Facility, Sandia National Laboratories, Livermore, CA

[3] School of Engineering, San Francisco State University, San Francisco

来源：

International Journal of Engine Research | 2006年 / 7卷 / 04期

关键词：

Adiabatic flame temperature; Biodiesel; Cetane number; Lift-off length; NO[!sub]x[!/sub; Optical engine; Soot radiation;

D O I：

10.1243/14680874JER05005

中图分类号：

学科分类号：

摘要：

The impact of biodiesel fuelling on NOx emissions was investigated using an optically accessible diesel engine. A soy-based biodiesel (B100) and three separate primary reference fuel (PRF) blends were evaluated over a range of loads at an engine speed of 800 r/min. Experimental operating conditions were carefully controlled to maintain a constant start of combustion (SOC), and a PRF blend was identified that would eliminate differences in premixed-burn fraction. A load-averaged NOx increase of ∼10 per cent was observed for B100 relative to the PRF blend with matched premixed-burn fraction. The results indicate that factors other than SOC and premixed-burn fraction affect the tendency for biodiesel to increase NOx. Equilibrium calculations reveal no significant differences in stoichiometric adiabatic flame temperature between the test fuels; however, experimental data suggest that actual flame temperatures may be influenced by differences in soot radiative heat transfer. The effect of biodiesel on mixture stoichiometry at the lift-off length may also play an important role in increasing NOx emissions. © IMechE 2006.

引用

页码：297 / 318

页数：21

共 38 条

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[2]

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