| EGR率对船用柴油机中低负荷燃烧排放性能影响的仿真及试验研究 |
| |
| 引用本文： | 魏宇坤,安士杰,张志友.EGR率对船用柴油机中低负荷燃烧排放性能影响的仿真及试验研究[J].柴油机,2016,38(2):11-15. |
| |
| 作者姓名： | 魏宇坤 安士杰 张志友 |
| |
| 作者单位： | 海军工程大学动力工程学院,湖北武汉,430033 |
| |
| 基金项目： | 国家自然科学基金资助项目(51379212) |
| |
| 摘 要： | 在船用高压共轨柴油机TBD234V6上进行了中低负荷工况下EGR率对柴油机燃烧排放性能影响的试验研究。应用AVL-FIRE软件建模,对柴油机缸内燃烧过程进行CFD仿真分析。仿真和试验研究结果表明:中低负荷工况下采用EGR能够有效降低NO_x的排放。EGR率较小时,对柴油机的性能影响较小;当EGR率较大时,柴油机的工作性能恶化,soot排放迅速增多。特定工况下的CFD模拟结果显示:随着EGR率的增加,燃烧过程的最高压力和最高温度降低,放热速率减小,燃烧过程变得平缓。
|
| 关 键 词： | 船用柴油机 EGR 燃烧 排放 |
| 收稿时间： | 2015/7/23 0:00:00 |
| 修稿时间： | 2015/9/18 0:00:00 |
Simulation and Experimental Study of the Influence of EGR Rate onthe Performances of Combustion and Emission at Low andNormal Loads of Marine Diesel Engine |
| |
| Wei Yukun,An Shijie and Zhang Zhiyou.Simulation and Experimental Study of the Influence of EGR Rate onthe Performances of Combustion and Emission at Low andNormal Loads of Marine Diesel Engine[J].Diesel Engine,2016,38(2):11-15. |
| |
| Authors: | Wei Yukun An Shijie and Zhang Zhiyou |
| |
| Affiliation: | College of Power Engineering, Naval University of Engineering, Hubei Wuhan 430033,College of Power Engineering, Naval University of Engineering, Hubei Wuhan 430033 and College of Power Engineering, Naval University of Engineering, Hubei Wuhan 430033 |
| |
| Abstract: | This study examined the impacts of EGR rate on the performances of combustion and emission at low and normal loads working conditions on a TBD234V6 high pressure common rail marine diesel engine. In addition, the combustion process in cylinders was predicted with CFD simulation using a model established by AVL-FIRE software. Simulation and experimental results showed that EGR rate effectively reduced NOx emission at low and normal loads working conditions. At low EGR rates, diesel engine working performance was little impaired. But at high EGR rates, the working performance deteriorated, and the soot emission increased rapidly. The simulation results also showed that the increase of EGR rate at specific working condition reduced the maximum pressure, maximum temperature and the heat release rate of the combustion process, which smoothed the combustion process. |
| |
| Keywords: | marine diesel engine EGR combustion emission |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《柴油机》浏览原始摘要信息 |
|
点击此处可从《柴油机》下载全文 |
|
