负荷对柴油/PODE混合燃料燃烧及排放的影响  

Effect of Load on Combustion and Emissions of Diesel/PODE Blended Fuels

作　　者：穆若语 肖合林[1,2] MU Ruo-yu;XIAO He-lin(Hubei Key Laboratory of Advanced Technology of Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉430070 [2]武汉理工大学汽车零部件技术湖北省协同创新中心,武汉430070

出　　处：《武汉理工大学学报》2023年第6期123-129,共7页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(21377101)。

摘　　要：为满足柴油机国Ⅵ排放法规,在一台四缸水冷直喷式柴油机上进行试验,使用柴油与聚甲氧基二甲醚(PODE)混合燃料,探究不同负荷下混合燃料燃烧及排放特性。结果表明:负荷增大,缸内压力升高,滞燃期减短,而燃烧持续期延长,当量燃油消耗率先下降后上升。排放物方面,NOx、碳烟和PAHs排放量逐渐上升,HC排放则持续降低,CO排放和1,3-丁二烯排放趋势为先减少后增加。掺混PODE可以进一步增大缸压峰值,放热率峰值升高且更早出现,滞燃期和燃烧持续期略有缩减,当量燃油消耗率上升,而有效热效率降低,加入PODE可以有效降低CO、HC、碳烟和PAHs的排放,但NOx排放有所上升,对于1,3-丁二烯的影响则是先减少后增加。This study experimented on a four-cylinder water-cooled direct-injection diesel engine using a blend of diesel fuel and polyoxymethylene dimethyl ether(PODE)to examine the combustion and emission characteristics of the blended fuel under various load conditions in order to comply with the National VI emission regulations for diesel engines.The findings showed that the equivalent fuel consumption rate initially reduced and subsequently climbed as the load increased,while in-cylinder pressure increased,the ignition delay was shortened,and the combustion duration was enhanced.In terms of emissions,NOx,soot,and PAH levels gradually rose,HC emissions steadily fell,while CO and 1,3-butadiene emission patterns fluctuated between decreasing and increasing.The addition of PODE boosted the peak cylinder pressure even more,accelerated the appearance of the peak heat release rate,and marginally shortened the times between ignition and combustion.While the effective thermal efficiency decreased,the equivalent fuel consumption rate rose.While NOx emissions increased and the impact on 1,3-butadiene emissions first decreased and then increased,the addition of PODE effectively reduced CO,HC,soot,and PAHs emissions.

关 键 词：柴油 聚甲氧基二甲醚 负荷 燃烧及排放特性 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]