柴油机燃用不同含氧掺混燃料燃烧火焰和碳烟排放的研究
Study on the Blending Effects of Oxygenated Fuels on Natural Flame Luminosity and Soot Reduction on an Optical Diesel Engine
在一台改造的光学单缸机上，研究了柴油与三种不同含氧燃料掺混后对柴油机缸内燃烧火焰发光的影响。三种含氧燃料分别为丁酸甲酯（MB），正丁醇（B）和2,5二甲基呋喃（DMF），掺混体积比为20%，用符号MB20，B20和DMF20表示。光学发动机转速为1200 r/min、喷油量为20 mg/cycle，喷油压力为600 bar。结果表明：柴油的发光滞燃期与放热滞燃期的差距最大，三种类型含氧掺混燃料在燃烧过程初期出现明显的、持续时间更长的"蓝焰"化学发光；三种含氧掺混燃料对燃烧碳烟的降低能力依次为：DMF20>MB20>B20，DMF20降低碳烟的能力受滞燃期主导，后两者主要由含氧量决定；含氧燃料的加入减小了燃烧过程中的火焰温度和火焰面积，降低了燃烧过程中的碳烟。
High-speed imaging and thermodynamic analyses were applied to an optically accessible diesel engine, at engine speed of 1200 rpm and fuel-injection quantity of 20 mg/cycle, to investigate the effects of blending of 3 types of oxygenated fuel with diesel on natural luminosity of combustion. 20% of methyl butyrate, n-butanol and DMF were blended with diesel by volume, respectively, referred to as MB20, B20 and DMF20. Results show that D100 has the largest gap between the ignition delay derived from heat release and natural luminosity. Obvious "blue flame" from chemiluminescence of combustion process is observed for all of these 3 blends. The ability for soot reduction of these three oxygenated fuels in descending order is DMF20, MB20 and B20. Longer ignition delay plays the most important role in soot reduction in the combustion process of DMF20, while for MB20 and B20, oxygen content prevails. The blending of oxygenated fuels reduces the flame area and flame temperature, and cuts down the soot formed in combustion process.
尧命发、唐青龙、陈贝凌、张鹏、刘海峰
内燃机燃料化学工业
动力机械及工程含氧燃料光学发动机高速摄像双色法
power machinery and engineeringoxygenated fuelsoptically accessible enginehigh-speed imagingtwo-color method
尧命发,唐青龙,陈贝凌,张鹏,刘海峰.柴油机燃用不同含氧掺混燃料燃烧火焰和碳烟排放的研究[EB/OL].(2014-07-02)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201407-26.点此复制
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