丁醇均质混合气与柴油的复合燃烧特性  

Characteristics of Butanol Homogeneous Charge and Diesel Fuel Compound Combustion

作　　者：田维[1] 楚云路 马帅[1] 韩伟强[1] 夏琦[3] Tian Wei;Chu Yunlu;Ma Shuai;Han Weiqiang;Xia Qi(School of Automobile & Transportation,Xihua University,Chengdu 610039,China;Oujiang College,Wenzhou University,Wenzhou 325035,China;Motorized Vehicle Exhaust Gas Pollution Monitoring and Control Center,Chengdu 610000,China)

机构地区：[1]西华大学汽车与交通学院,成都610039 [2]成都市机动车排气污染监控中心,成都610000 [3]温州大学瓯江学院,温州325035

出　　处：《燃烧科学与技术》2017年第4期351-357,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51406137);教育部流体及动力机械省部共建重点实验室资助项目(SBZDPY-11-19);天津大学内燃机燃烧学国家重点实验室开放基金资助项目(K2015-06)

摘　　要：在一台四缸轻型柴油机上增加一套低压共轨系统,实现了进气道丁醇喷射,研究了不同负荷、不同柴油替代率条件下丁醇均质混合气与柴油的复合燃烧特性.结果表明:丁醇均质混合气与柴油复合燃烧的放热率曲线呈双峰,第一峰是由于丁醇的自燃形成的,第二峰是由于柴油点燃丁醇均质混合气形成的.在丁醇均质混合气过量空气系数不变时,丁醇自燃的始点主要受到缸内气体状态的影响,自燃的放热量与丁醇的循环喷射量呈正相关.复合燃烧的快速燃烧期始点取决于柴油的着火时刻,与丁醇的比例关系不大;快速燃烧期的终点(放热率曲线的分离点)与柴油的循环喷射量呈正相关.丁醇预混合气与柴油复合燃烧的热效率随柴油替代率的增大而增大,且高于纯柴油燃烧模式.A low pressure common rail was added to a four-cylinder light duty diesel engine to realize manifoldbutanol injection.The compound combustion of butanol homogeneous charge and diesel fuel under different engineload and butanol ratio was investigated on the aforementioned diesel engine.Results show that the compound combustionhas two heat release peaks,the first is due to the auto-ignition of premixed air-butanol mixture and thesecond is due to the ignition of the premixed air-butanol mixture by diesel fuel.When the fuel/air equivalence ratioof premixed air-butanol mixture is fixed,the timing of auto-ignition is determined by the state inside thecylinder,and the quantity of heat is positively correlated with the quantity of butanol injection per cycle.The startof rapid combustion duration of compound combustion is determined by the start of diesel combustion but has nothingto do with the quantity of butanol injection per cycle,and the end of the compound combustion is determinedby the quantity of diesel fuel injection per cycle.The thermal efficiency of compound combustion gets higher withthe increase of the ratio of butanol,and the thermal efficiency of compound combustion is higher than that pure diesel fuel combustion.

关 键 词：丁醇均质混合气 复合燃烧 放热率双峰 燃烧特性 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]