生物柴油碳链长度对小口径光学柴油机缸内碳烟形成过程的影响

2019/12/11   下载量： 0 次

方案摘要

方案下载
应用领域 石油/化工
检测样本 柴油
检测项目 理化分析
参考标准 暂无

采用LaVision的激光诱导荧光和激光诱导白炽光测量方法，对生物柴油碳链长度对小口径光学柴油机缸内碳烟形成过程的影响进行了研究。

方案下载
配置单
方案详情

This study examines the effects of biodiesel carbon chain length on the development of high-temperature flame and soot in single-cylinder, light-duty, optical diesel engine. Planar laser-induced fluorescence of OH (OH-PLIF) and laser-induced incandescence (soot-PLII) are performed separately using petroleum diesel and two biodiesel surrogate fuels. The selected surrogate fuels have a saponification number (SN) of 330 and 233 for shorter and longer carbon chain length, respectively, while the iodine value (IV) characterising the degree of unsaturation is kept similar. The laser-based images are shown together with the chemiluminescence images of naturally occurring cool-flame signals and electronically excited OH (OH∗). The start of high-temperature reaction timing was matched for the tested fuels by adjusting the injection timing so that the in-cylinder ambient conditions at the start of combustion were consistent. The results show that the longer carbon chain biodiesel has shorter ignition delay time, which makes a significant impact on the spatial and temporal development of high-temperature reaction zones. The OH signals for the longer carbon chain length biodiesel are observed close to the piston-bowl wall whereas they appear later in the penetrating front of the wall-interacting jet for the shorter carbon chain length biodiesel. Both fuels show soot formation occurring in the wall-jet head region while the longer carbon chain length biodiesel has higher soot concentration and larger area than that of the shorter carbon chain biodiesel. This is due to lower pre-combustion mixing, reduced fuel oxygen content, and possibly less significant OH-induced soot oxidation.


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 工业侧流多纤维增强钙铝矾基复合材料

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 生物柴油碳链长度对小口径光学柴油机缸内碳烟形成过程的影响

关注

拨打电话

留言咨询