HCCI甲醇发动机燃烧过程三维数值模拟  

Three Dimensional Numerical Simulation of the Combustion Process in the HCCI Engine Fueled with Methanol

作　　者：李程[1] 周昌祁[1] 许伟康[1] 刘元[1] 

机构地区：[1]武汉理工大学,武汉430070

出　　处：《柴油机设计与制造》2010年第4期1-4,21,共5页Design and Manufacture of Diesel Engine

摘　　要：以AVL-FIRE作为三维瞬态模拟软件,对HCCI甲醇发动机在1500、3000和5000r/min三种工况下燃烧过程进行了数值模拟。结果表明:这三种转速下燃烧过程混合气的速度和浓度分布相似;转速越高,火焰前锋的速度越大,燃烧越迅速,而缸内混合气当量比越小。结果还表明:在排气门开启时刻缸内未燃甲醇的量较高,碳烟的排放量很低,小于1×10-9。计算结果可为HCCI甲醇发动机的燃烧和排放性能改善提供一定的理论依据。The combustion process in the HCCI methanol engine at 1500,3000 and 5000 r/min is simulated based on the AVL-FIRE tool. The results show that the velocity and concentration fields of mixture are similar at three working conditions. The larger the engine speed is,the faster the velocity of the flame forward is,while the lower the equivalence ratio of the mixture in cylinder is. The stimulation results also show that the amount of unburned methanol is high,while PM is every low. The stimulation results can be regarded as a kind of reference base for improving combustion and emission reduction in the HCCI methanol engine.

关 键 词：燃烧 数值模拟 甲醇 HCCI 

分 类 号：TK46[动力工程及工程热物理—动力机械及工程]