甲醇-柴油发动机缸内燃烧过程分析  

In-cylinder Combustion Process of Methanol-diesel Engine

作　　者：李仁春[1] 王忠[1] 袁银男[1,2] 张登攀[1] 李铭迪[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]南通大学机械工程学院,江苏南通226019

出　　处：《车用发动机》2014年第1期82-85,89,共5页Vehicle Engine

基　　金：国家自然科学基金项目(51376083;50776042);江苏省高校自然科学基金重点项目(10KJA470009);江苏省2012年度普通高校研究生科研创新计划项目(CXZZ12_0676);江苏大学高级专业人才科研启动基金项目(12JDG040)

摘　　要：在4B26增压发动机上,采用进气管喷射甲醇的方式实现甲醇-柴油的燃烧,对甲醇-柴油发动机燃烧过程进行分析,基于AVL Fire软件研究甲醇氛围内柴油的喷雾混合以及着火过程。结果表明:与燃烧柴油相比,甲醇-柴油发动机具有定容放热区域宽、热损失小、燃烧效率高等优点,但最高燃烧压力、放热率峰值以及燃烧最高温度较高;在甲醇氛围内,柴油喷射初期的油滴雾化速度较慢,滞燃期延长,着火点浓度和温度较高,燃烧速度较快,燃烧终点提前。On a 4B26 turbocharged engine ,the methanol-diesel combustion was realized by injecting the methanol in the intake pipe and its process was analyzed .With AVL Fire software ,the mixing and ignition process of diesel and air premixed with methanol were researched .The results show that the methanol-diesel fuel has the characteristics of wider constant volume heat release region ,less heat loss ,higher thermal efficiency ,higher peak combustion pressure ,higher peak thermal efficiency and higher peak combustion temperature .In the compressed air premixed with methanol ,the atomizing speed of fuel drop decreases at the beginning of diesel injection and the ignition delay extends ,but the richer mixture and higher temperature of ignition point accelerate combustion velocity and thus shorten combustion duration .

关 键 词：甲醇 柴油 燃油喷雾 燃烧过程 数值模拟 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]