Simultaneous PLIF Imaging of OH and PLII Imaging of Soot for Studying the Late-Cycle Soot Oxidation in an Optical Heavy-Duty Diesel Engine

Event
SAE 2016 World Congress and Exhibition
Authors Abstract
Content
The effects of injection pressure and swirl ratio on the in-cylinder soot oxidation are studied using simultaneous PLIF imaging of OH and LII imaging of soot in an optical diesel engine. Images are acquired after the end of injection in the recirculation zone between two adjacent diesel jets. Scalars are extracted from the images and compared with trends in engine-out soot emissions. The soot emissions decrease monotonically with increasing injection pressure but show a non-linear dependence on swirl ratio. The total amount of OH in the images is negatively correlated with the soot emissions, as is the spatial proximity between the OH and soot regions. This indicates that OH is an important soot oxidizer and that it needs to be located close to the soot to perform this function. The total amount of soot in the images shows no apparent correlation with the soot emissions, indicating that the amount of soot formed is a poor predictor of the emission trends.
Meta TagsDetails
DOI
https://doi.org/10.4271/2016-01-0723
Pages
10
Citation
Lind, T., Li, Z., Micó, C., Olofsson, N. et al., "Simultaneous PLIF Imaging of OH and PLII Imaging of Soot for Studying the Late-Cycle Soot Oxidation in an Optical Heavy-Duty Diesel Engine," SAE Int. J. Engines 9(2):849-858, 2016, https://doi.org/10.4271/2016-01-0723.
Additional Details
Publisher
Published
Apr 5, 2016
Product Code
2016-01-0723
Content Type
Journal Article
Language
English