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Simultaneous 36 kHz PLIF/chemiluminescence imaging of fuel, CH2O and combustion in a PPC engine

Wang, Zhenkan LU ; Stamatoglou, Panagiota LU ; Lundgren, Marcus LU ; Luise, Ludovica; Vaglieco, Bianca Maria; Andersson, Arne; Aldén, Marcus LU ; Andersson, Öivind LU and Richter, Mattias LU (2018) In Proceedings of the Combustion Institute2000-01-01+01:00
Abstract

The requirements on high efficiency and low emissions of internal combustion engines (ICEs) raise the research focus on advanced combustion concepts, e.g., premixed-charge compression ignition (PCCI), partially premixed compression ignition (PPCI), reactivity controlled compression ignition (RCCI), partially premixed combustion (PPC), gasoline compression ignition (GCI) etc. In the present study, an optically accessible engine is operated in PPC mode, featuring compression ignition of a diluted, stratified charge of gasoline-like fuel injected directly into the cylinder. A high-speed, high-power burst-mode laser system in combination with a high-speed CMOS camera is employed for diagnostics of the autoignition process which is critical... (More)

The requirements on high efficiency and low emissions of internal combustion engines (ICEs) raise the research focus on advanced combustion concepts, e.g., premixed-charge compression ignition (PCCI), partially premixed compression ignition (PPCI), reactivity controlled compression ignition (RCCI), partially premixed combustion (PPC), gasoline compression ignition (GCI) etc. In the present study, an optically accessible engine is operated in PPC mode, featuring compression ignition of a diluted, stratified charge of gasoline-like fuel injected directly into the cylinder. A high-speed, high-power burst-mode laser system in combination with a high-speed CMOS camera is employed for diagnostics of the autoignition process which is critical for the combustion phasing and efficiency of the engine. To the authors' best knowledge, this work demonstrates for the first time the application of the burst-system for simultaneous fuel tracer planar laser induced fluorescence (PLIF) and chemiluminescence imaging in an optical engine, at 36 kHz repetition rate. In addition, high-speed formaldehyde PLIF and chemiluminescence imaging are employed for investigation of autoignition events with a high temporal resolution (5 frames/CAD). The development of autoignition together with fuel or CH2O distribution are simultaneously visualized using a large number of consecutive images. Prior to the onset of combustion the majority of both fuel and CH2O are located in the recirculation zone, where the first autoignition also occurs. The ability to record, in excess of 100 PLIF images, in a single cycle brings unique possibilities to follow the in-cylinder processes without the averaging effects caused by cycle-to-cycle variations.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Autoignition, Burst-mode laser, Planar laser induced fluorescence, PPC, Ultra-high speed diagnostics
in
Proceedings of the Combustion Institute2000-01-01+01:00
publisher
Elsevier
external identifiers
  • scopus:85052702821
ISSN
1540-7489
DOI
10.1016/j.proci.2018.06.019
language
English
LU publication?
yes
id
6c0a6ad3-fab4-463d-bae9-266262ac72a7
date added to LUP
2018-10-04 10:27:54
date last changed
2019-01-06 14:06:57
@article{6c0a6ad3-fab4-463d-bae9-266262ac72a7,
  abstract     = {<p>The requirements on high efficiency and low emissions of internal combustion engines (ICEs) raise the research focus on advanced combustion concepts, e.g., premixed-charge compression ignition (PCCI), partially premixed compression ignition (PPCI), reactivity controlled compression ignition (RCCI), partially premixed combustion (PPC), gasoline compression ignition (GCI) etc. In the present study, an optically accessible engine is operated in PPC mode, featuring compression ignition of a diluted, stratified charge of gasoline-like fuel injected directly into the cylinder. A high-speed, high-power burst-mode laser system in combination with a high-speed CMOS camera is employed for diagnostics of the autoignition process which is critical for the combustion phasing and efficiency of the engine. To the authors' best knowledge, this work demonstrates for the first time the application of the burst-system for simultaneous fuel tracer planar laser induced fluorescence (PLIF) and chemiluminescence imaging in an optical engine, at 36 kHz repetition rate. In addition, high-speed formaldehyde PLIF and chemiluminescence imaging are employed for investigation of autoignition events with a high temporal resolution (5 frames/CAD). The development of autoignition together with fuel or CH<sub>2</sub>O distribution are simultaneously visualized using a large number of consecutive images. Prior to the onset of combustion the majority of both fuel and CH<sub>2</sub>O are located in the recirculation zone, where the first autoignition also occurs. The ability to record, in excess of 100 PLIF images, in a single cycle brings unique possibilities to follow the in-cylinder processes without the averaging effects caused by cycle-to-cycle variations.</p>},
  author       = {Wang, Zhenkan and Stamatoglou, Panagiota and Lundgren, Marcus and Luise, Ludovica and Vaglieco, Bianca Maria and Andersson, Arne and Aldén, Marcus and Andersson, Öivind and Richter, Mattias},
  issn         = {1540-7489},
  keyword      = {Autoignition,Burst-mode laser,Planar laser induced fluorescence,PPC,Ultra-high speed diagnostics},
  language     = {eng},
  month        = {09},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute2000-01-01+01:00},
  title        = {Simultaneous 36 kHz PLIF/chemiluminescence imaging of fuel, CH<sub>2</sub>O and combustion in a PPC engine},
  url          = {http://dx.doi.org/10.1016/j.proci.2018.06.019},
  year         = {2018},
}