生物柴油/甲醇混合燃料发动机的性能和排放  

Performance and Emissions of Engine Fueled with Biodiesel/Methanol Blends

作　　者：喻武[1] 张志远[2] 陈财森[3] 黄佐华[4] 徐玉国[5] 

机构地区：[1]装甲兵工程学院教练团,北京100072 [2]装甲兵工程学院机械工程系,北京100072 [3]装甲兵工程学院科研部,北京100072 [4]西安交通大学动力工程多相流国家重点实验室,陕西西安710049 [5]装甲兵工程学院技术保障工程系,北京100072

出　　处：《装甲兵工程学院学报》2015年第3期47-54,共8页Journal of Academy of Armored Force Engineering

摘　　要：基于生物柴油和甲醇的互补特性,研究了掺混不同比例甲醇对燃用生物柴油的发动机性能和各种污染物排放的影响。研究表明:在生物柴油中掺混甲醇后,发动机的有效燃油消耗率增加,但是有效热效率变化不大;在预喷阶段,随着生物柴油/甲醇混合燃料中甲醇比例的增加,燃料预喷阶段的放热率峰值降低并且放热开始时刻推迟;在主喷射对应的放热阶段,掺混甲醇导致放热率峰值增大,放热持续时间减少;生物柴油掺混甲醇后,发动机HC和CO排放增加,NOx排放在中小负荷下减小,在高负荷下增加;发动机的碳烟排放随燃料中含氧比例增加而逐渐减小;使用生物柴油/甲醇燃料时,柴油机NOx排放与碳烟排放的trade-off关系在中小负荷下有所改善。Based on the complementary advantages between biodiesel and methanol,the influence of methanol addition to biodiesel on engine performance and emissions is investigated. Experimental results show that,with the increase of methanol fraction in blended fuels,the brake specific fuel consumption increases while the brake thermal efficiency varies little at most engine loads; with the increase of methanol proportion in the blends of biodiesel and methanol,the peak of heat release rate in the pilot injection decreases and the heat release start time is delayed,the peak of heat release rate in the main injection increases after blended with methanol while heat release duration decreases; after the biodiesel is blended with methanol,CO and HC emissions of engine increase dramatically,NOxemissions decrease at low and medium loads,while increases at high load; soot emissions decrease as oxygen proportion is increased.When using biodiesel-methanol fuel,the trade-off correlation of NOxemissions and soot emissions is improved at low and medium loads.

关 键 词：生物柴油 甲醇 柴油机 排放 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程] TQ517[化学工程]