Biodiesel combustion in an optical HSDI diesel engine under low load premixed combustion conditions

被引:75
作者
Fang, Tiegang [2 ]
Lin, Yuan-Chung [1 ]
Foong, Tien Mun [3 ]
Lee, Chia-fon [3 ]
机构
[1] Natl Sun Yat Sen Univ, Inst Environm Engn, Kaohsiung 804, Taiwan
[2] N Carolina State Univ, Dept Mech & Aero Engn, Raleigh, NC 27695 USA
[3] Univ Illinois, Dept Mech Sci & Engr, Urbana, IL 61801 USA
关键词
Biodiesel; Spray; Combustion visualization; EMISSIONS; PERFORMANCE; BLENDS; FUEL; PAH; OXIDATION;
D O I
10.1016/j.fuel.2009.02.033
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
An optically accessible single-cylinder high-speed direct-injection (HSDI) diesel engine was used to investigate the spray and combustion processes for biodiesel blends under different injection strategies. The experimental results indicated that the heat release rate was dominated by a premixed combustion pattern and the heat release rate peak became smaller with injection timing retardation. The ignition and heat release rate peak occurred later with increasing biodiesel content. Fuel impingement on the wall was observed for all test conditions. The liquid penetration became longer and the fuel impingement was stronger with the increase of biodiesel content. Early and late injection timings result in lower flame luminosity due to improved mixing with longer ignition delay. For all the injection timings, lower soot luminosity was seen for biodiesel blends than pure diesel fuel. Furthermore, NOx emissions were dramatically reduced for premixed combustion mode with retarded post-TDC injection strategies. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2154 / 2162
页数:9
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