二甲醚发动机HCCI燃烧的试验和数值模拟研究  

Experimental and Numerical Simulation Study on HCCI Combustion in DME Engine

作　　者：钟赟[1] 乔信起[1] 李德钢[1] 黄震[1] 罗马吉[1] 

机构地区：[1]上海交通大学机械与动力工程学院内燃机研究所,上海200030

出　　处：《车用发动机》2005年第2期10-12,共3页Vehicle Engine

基　　金：国家自然科学基金项目(50276035);国家自然科学基金重点项目(50136040)

摘　　要：结合详细化学反应动力学机理,采用单区模型计算了二甲醚发动机均质充量压缩燃烧过程中缸内压力、缸内温度、重要中间产物浓度、NOx 浓度等的变化,并将计算结果与试验结果进行了比较。结果表明,二甲醚均质充量压缩燃烧具有两阶段着火特性,着火时间、NOx 排放和缸内压力变化趋势预测准确。Single-zone model combined with detailed chemical kinetic mechanism was used to simulate in-cylinder pressure, temperature, intermediate concentrations and NO_x emissions of HCCI combustion in a diesel engine fueled with DME. The simulation results were compared to experimental ones. It shows HCCI combustion of DME engine demonstrates two-stage ignition. And the ignition time, NOx emissions and the in-cylinder pressure trend were well predicted.

关 键 词：均质充量压缩点火 二甲醚 数值模拟 压燃式内燃机 

分 类 号：TK431[动力工程及工程热物理—动力机械及工程]