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

Lind, Ted LU ; Li, Zheming LU ; Micó, Carlos; Olofsson, Nils Erik LU ; Bengtsson, Per Erik LU ; Richter, Mattias LU and Andersson, Öivind LU (2016) In SAE International Journal of Engines 9(2). p.849-858
Abstract

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... (More)

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.

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organization
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type
Contribution to journal
publication status
published
subject
in
SAE International Journal of Engines
volume
9
issue
2
pages
10 pages
publisher
SAE
external identifiers
  • scopus:85017565299
  • wos:000384710600017
ISSN
1946-3936
DOI
10.4271/2016-01-0723
language
English
LU publication?
yes
id
bc72c916-1d03-4c70-9d0d-7f504976906d
date added to LUP
2017-05-10 13:15:00
date last changed
2017-09-18 11:35:34
@article{bc72c916-1d03-4c70-9d0d-7f504976906d,
  abstract     = {<p>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.</p>},
  author       = {Lind, Ted and Li, Zheming and Micó, Carlos and Olofsson, Nils Erik and Bengtsson, Per Erik and Richter, Mattias and Andersson, Öivind},
  issn         = {1946-3936},
  language     = {eng},
  month        = {04},
  number       = {2},
  pages        = {849--858},
  publisher    = {SAE},
  series       = {SAE International Journal of Engines},
  title        = {Simultaneous PLIF Imaging of OH and PLII Imaging of Soot for Studying the Late-Cycle Soot Oxidation in an Optical Heavy-Duty Diesel Engine},
  url          = {http://dx.doi.org/10.4271/2016-01-0723},
  volume       = {9},
  year         = {2016},
}