柴油机燃用煤基含氧混合燃料的燃烧及排放特性  

Combustion and emissions of diesel engine fuelled with CTL-oxygenated mixed fuel

作　　者：左鹏[1] 武志斐[1] 王铁[1] 曹贻森 王文坤[1] 孙秀全[1] 

机构地区：[1]太原理工大学车辆工程系,山西太原030024

出　　处：《可再生能源》2015年第11期1730-1735,共6页Renewable Energy Resources

基　　金：山西省自然科学基金资助项目(2014021024-3)

摘　　要：在F-T柴油中添加不同比例的丁醇、生物柴油燃料,并与0#柴油做了燃烧及排放特性的对比研究。研究结果表明:混合燃料的预混合燃烧期、扩散燃烧期、缸压峰值与放热率峰值均介于0#柴油与F-T柴油之间;相对于0#柴油,混合燃料燃烧始点提前,CA50增加,燃烧放热中心向后推迟,燃烧放热率第一峰值降低;所在相位提前,预混合燃烧放热量降低,有利于降低燃烧过程的最高温度,实现低温燃烧,第二峰值升高,扩散燃烧所占比重增加;在转速为2 000 r/min时,混合燃料(N10,N20和N10B10)的NOx排放量较0#柴油分别降低了23.40%,26.95%和23.25%,其中主要是NO的降低,NO2的排放量因为低温燃烧反而略有上升;外特性下,碳烟排放量较0#柴油分别平均降低71.47%,77.16%,68.80%。The effect of F-T diesel blending in varying proportions n-butyl alcohol and biodiesel on the combustion and emission characteristics were investigated. The results show that： premixed combustion period, diffusion combustion period, the cylinder pressure peak and the peak heat release rate of mixed fuels were between O# diesel and F-T diesel. Compared to 0# diesel, while the proportion of oxygen increased, the ignition time advanced, the CA50 increased and the combustion heat release center was postponed. The first peak combustion heat release rate decreased, phase advance. Premixed combustion heat reduction, which was beneficial to realize low temperature combustion. The other peak value increased and the diffusion combustion in proportion was increased. Under the 2 000 r/rain, NIO, N20 and N10B10 NOx emissions were reduced by 23.40%, 26.95%, 23.25% respectively, mainly the NO reduction, NO2 emissions because of low temperature burning up instead. Under the external characteristic, soot emissions were reduced by an average 71.47%, 77.16% and 68.80% respectively. Diesel engine fuelled with CTL- oxygenated blends can simultaneously decrease both soot and NOx emissions.

关 键 词：煤基燃料 含氧燃料 燃烧 排放 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]