醇醚双燃料均质压缩燃烧过程分析  

The Combustion Process Analysis of HCCI Mode of Diesel Engine Fueled with Methanol/ Dimethyl Ether

作　　者：闫妍[1] 张煜盛 孟忠伟[1] 吴怡[1] 

机构地区：[1]西华大学交通与汽车工程学院,四川成都610039 [2]华中科技大学能源动力工程学院,湖北武汉430074

出　　处：《西华大学学报（自然科学版）》2013年第2期46-49,共4页Journal of Xihua University:Natural Science Edition

基　　金：国家自然科学基金项目(20777023;51106130);四川省教育厅自然科学项目(10ZB078;12ZB138);西华大学重点科研项目(Z1120320;Z1120319)

摘　　要：建立了甲醇/二甲醚HCCI发动机燃烧与排放的多维数学模型。模型考虑了进排气道及燃烧室内部不对称结构。利用CFD软件FLUENT耦合双燃料简化动力学模型,对二甲醚/甲醇发动机的HCCI燃烧过程进行了模拟计算。结果表明,多维模型能够较好地预测缸内压力、温度、物质浓度随曲轴转角的变化过程和着火时刻。双燃料HCCI燃烧过程中有2个高温核心,分别是气缸左下底部和右上方边缘地带的两个区域,低温反应最早从这2个部位开始向缸内其他部位延伸。缸内平均温度达到900 K左右开始低温反应,1100 K左右开始高温反应。A multi-dimensional model of methanol / DME dual fuel HCCI engine was established with the consideration of inlet port, exhaust port, and internal asymmetric structure of combustion chamber. The results showed that the multi-dimensional model could pre- dict the cylinder pressure, temperature, the fuel concentration and ignition timing. There were two high temperature regions in HCCI combustion process, the left lower bottom and the right upper edge of the cylinder, the low-temperature reaction firstly started from these regions. The low-temperature reaction started when cylinder average temperature was about 900K , the high-temperature reaction started when cylinder average temperature was about 1100K.

关 键 词：二甲醚 甲醇 均质压燃(HCCI) 燃烧过程 

分 类 号：U464[机械工程—车辆工程]