生物柴油-乙醇-水微乳化燃料的燃烧和排放特性  

Combustion and emission characteristics of biodieselethanol-water micro-emulsion fuel

作　　者：陈昊[1] 欧阳雪[1] 任学成[1] 宋宝珍[1] 何建[1] 

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2009年第4期101-105,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200631826253)

摘　　要：为了研究生物柴油-乙醇-水微乳化燃料在柴油机上的应用,在一台单缸直喷式柴油机上进行了燃烧特性和排放特性的对比试验,分别使用燃烧分析仪和排放分析仪,测录燃料的燃烧压力和排放浓度。研究结果表明:与生物柴油相比,随着乙醇和水的加入,微乳化燃料的压力曲线、压力升高率曲线以及放热率曲线明显后移;小负荷时,生物柴油-乙醇-水微乳化燃料峰值燃烧压力高,而峰值压力升高率和峰值瞬时燃烧放热率略低;大负荷时,微乳化燃料峰值燃烧压力、峰值压力升高率和峰值瞬时燃烧放热率均明显增加;微乳化燃料燃烧开始时放热明显滞后,燃烧结束时放热明显提前,微乳化燃料NOx和烟度排放降低。To study the application of biodiesel ethanol-water micro emulsion fuel on diesel engines, the combustion and emission performances are compared on a single-cylinder diesel engine, the combustion analyzer and emission analyzer are used to test the pressure and emission concen tration of fuels respectively. The results indicate that： compared with biodiesel, with the adding of ethanol and water, the combustion curves of micro-emulsion fuel will delay apparently; at small loads, the peak pressure of micro emulsion fuel is high, while peak pressure ratio and peak heat release ratio will decrease; at high loads, the peak pressure, peak pressure ratio and peak heat release ratio of micro-emulsion fuel will increase; the start of combustion will delay, but at the end of combustion, the heat release ratio will increase obviously; NOx and smoke of the micro-emulsion fuel will decrease. 1 tab, 7 figs, 16 refs.

关 键 词：汽车工程 生物柴油-乙醇-水 微乳化燃料 燃烧特性 排放特性 

分 类 号：U473[机械工程—车辆工程]