| 基于详细化学反应机理的增压二甲醚发动机燃烧与NO_x排放数值研究 |
| |
| 引用本文： | 张俊军,黄震,肖进,乔信起,吴君华.基于详细化学反应机理的增压二甲醚发动机燃烧与NO_x排放数值研究[J].内燃机工程,2009,30(3). |
| |
| 作者姓名： | 张俊军 黄震 肖进 乔信起 吴君华 |
| |
| 作者单位： | 上海交通大学,动力机械与工程教育部重点实验室,上海,200240 |
| |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| |
| 摘 要： | 使用KIVA-3V对增压柴油机和二甲醚发动机标定功率点的缸内燃烧过程与NOx排放进行了数值模拟研究.研究结果表明:计算所得的气缸压力和放热率曲线与实测值吻合较好.对缸内燃烧的温度分布计算表明:柴油燃烧滞燃期为2.5 °CA左右,二甲醚为1.5 °CA.柴油燃料着火始于喷雾前端两侧,在燃烧初期,其高温区分布在喷雾前端一侧,且在燃烧室内气流作用下沿垂直于喷雾方向扩散;二甲醚的着火点位于喷嘴附近,随喷雾的进行,其燃烧高温区从喷嘴附近一直延伸到喷雾前端,呈现狭长的高温带.在扩散燃烧后期,与柴油相比,二甲醚燃烧温度分布较均匀,且最高温度比柴油低.选用的9步NOx生成机理可较好地预测发动机实际运行中NOx排放水平.
|
| 关 键 词： | 内燃机 二甲醚 柴油 数值模拟 燃烧 排放 |
Numerical Study on Combustion and NO_x Emission Characteristics of Turbocharged DME Engine Based on Detailed Chemical Kinetic Mechanism |
| |
| ZHANG Jun-jun,HUANG Zhen,XIAO Jin,QIAO Xin-qi,WU Jun-hua.Numerical Study on Combustion and NO_x Emission Characteristics of Turbocharged DME Engine Based on Detailed Chemical Kinetic Mechanism[J].Chinese Internal Combustion Engine Engineering,2009,30(3). |
| |
| Authors: | ZHANG Jun-jun HUANG Zhen XIAO Jin QIAO Xin-qi WU Jun-hua |
| |
| Affiliation: | Key Laboratory for Power Machinery and Engineering of M.O.E.;Shanghai Jiaotong University;Shanghai 200240;China |
| |
| Abstract: | By using a CFD KIVA-3V model,the numerical results of combustion process and NOx emission simulation in a turbocharged diesel engine at the rated power were presented.Two fuels,diesel fuel and dimethyl ether(DME),were studied in order to gain an insight into the combustion characteristics of DME and diesel fuel.The results show that the calculated in-cylinder pressure and heat release rate are in good agreement with the measured results for both fuels.Distribution of temperature in the cylinder of the diese... |
| |
| Keywords: | IC engine DME diesel fuel numerical simulation combustion emission |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
