高速直喷柴油燃烧系统潜在的碳烟和一氧化碳减排方法

2011/03/11   下载量： 6 次

方案摘要

方案下载
应用领域 汽车及零部件
检测样本 整车安全
检测项目 主动安全>速度探测
参考标准 暂无

The current direction for Diesel combustion system development is towards homogenization, in order to reduce particulate and NOx emissions. However, a strong increase of carbon monoxide emissions (CO) is frequently noted in combination with enhanced homogenization. Therefore, the current investigation focuses on a detailed analysis of the particulate - CO trade-off using a laser-optical and multidimensional CFD investigation of the combustion process of a swirl HSDI system. The CFD methodology involves reduced kinetics for soot formation and oxidation and a three-step CO model. These models are validated by a detailed comparison to optical measurements of flow, spray penetration and the spatial distribution of soot, temperature and oxygen concentration. The results obtained show that high concentrations of CO occur as an intermediate combustion reaction product. Subsequently, CO and soot are oxidized in large areas of the combustion chamber. In part load operation, CO emissions are mainly caused by dilution effects in the early phases of combustion. However, the engine’s soot emissions are caused by insufficient oxidization. Soot generation and oxidation are found to be strongly impacted by the slight non-homogeneity of the swirl motion. The gaseous emissions are not affected by the small differences in local flow, which are outlined further in the text.

方案下载
配置单
上一篇 在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位
下一篇 悬停状态下的漩涡抖动

文献贡献者

北京欧兰科技发展有限公司
金牌会员 丨 第17年
查看全部资料
相关仪器 更多
相关方案
更多

相关产品

当前位置： 欧兰科技 方案 高速直喷柴油燃烧系统潜在的碳烟和一氧化碳减排方法

关注

拨打电话

留言咨询