A study of the relationship between NO_x and the ion current in a direct-injection diesel engine

详细信息    查看全文

• 作者：Rahul Rao ; ^{rrao2.monash@gmail.com} ; Damon Honnery
• 关键词：Ion current ; NOx ; Diesel engine ; N-heptane ; Chemical kinetics
• 刊名：Combustion and Flame
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：176
• 期：Complete
• 页码：309-317
• 全文大小：2061 K
• 卷排序：176

文摘

This paper presents a modelling study of the ion current formed in a direct-injection diesel engine via chemical kinetics in order to investigate the strong correlation observed experimentally between tailpipe NOx and the ion current. An established n-heptane mechanism augmented with ionic and NOx sub-mechanisms is used to model the formation of ions and NOx in three combustion systems, including a phenomenological diesel engine model whose validation is also presented here. Sensitivity analyses are conducted on electron and NOx formation to determine species and reactions common to both. The O radical and, by extension, the mixture temperature are found to be important to both NOx and electron concentrations via mechanisms identified here.