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High-Speed PLIF Imaging for Investigation of Turbulence Effects on Heat Release Rates in HCCI Combustion

Seyfried, Hans LU ; Olofsson, Jimmy LU ; Sjöholm, Johan LU ; Richter, Mattias LU ; Aldén, Marcus LU ; Vressner, Andreas LU ; Hultqvist, Anders LU and Johansson, Bengt LU (2007) In SAE technical paper series
Abstract
High-speed laser diagnostics was utilized for single-cycle resolved studies of the fuel distribution in the combustion chamber of a truck-size HCCI engine. A multi-YAG laser system consisting of four individual Nd:YAG lasers was used for planar laser-induced fluorescence (PLIF) imaging of the fuel distribution. The fundamental beam from the lasers at 1064 nm was frequency quadrupled in order to obtain laser pulses at 266 nm suitable for excitation of acetone that was used as fuel tracer. Bursts of up to eight pulses with very short time separation were produced, allowing PLIF images with high temporal resolution to be captured within one single cycle event. The system was used together with a high-speed framing camera employing eight ICCD... (More)
High-speed laser diagnostics was utilized for single-cycle resolved studies of the fuel distribution in the combustion chamber of a truck-size HCCI engine. A multi-YAG laser system consisting of four individual Nd:YAG lasers was used for planar laser-induced fluorescence (PLIF) imaging of the fuel distribution. The fundamental beam from the lasers at 1064 nm was frequency quadrupled in order to obtain laser pulses at 266 nm suitable for excitation of acetone that was used as fuel tracer. Bursts of up to eight pulses with very short time separation were produced, allowing PLIF images with high temporal resolution to be captured within one single cycle event. The system was used together with a high-speed framing camera employing eight ICCD modules, with a frame-rate matching the laser pulse repetition rate. The combustion evolution was studied in terms of spatial distribution and rate of fuel consumption for different engine hardware configurations as well as operating conditions, e.g., different stoichiometries and combustion phasing. Two different piston crown geometries were used for altering the degree of turbulence in the combustion chamber. In addition to the optical investigations, the impact of turbulence effects was also studied by calculating the rate of heat release and combustion phasing from the pressure trace. (Less)
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published
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keywords
Laser diagnostics Combustion engines laser system
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SAE technical paper series
publisher
Society of Automotive Engineers
external identifiers
  • Scopus:84877213542
language
English
LU publication?
yes
id
494d4ae5-4df4-4820-a76b-b8320f2aa7fe (old id 742337)
date added to LUP
2007-12-13 12:08:36
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2017-01-01 08:15:42
@article{494d4ae5-4df4-4820-a76b-b8320f2aa7fe,
  abstract     = {High-speed laser diagnostics was utilized for single-cycle resolved studies of the fuel distribution in the combustion chamber of a truck-size HCCI engine. A multi-YAG laser system consisting of four individual Nd:YAG lasers was used for planar laser-induced fluorescence (PLIF) imaging of the fuel distribution. The fundamental beam from the lasers at 1064 nm was frequency quadrupled in order to obtain laser pulses at 266 nm suitable for excitation of acetone that was used as fuel tracer. Bursts of up to eight pulses with very short time separation were produced, allowing PLIF images with high temporal resolution to be captured within one single cycle event. The system was used together with a high-speed framing camera employing eight ICCD modules, with a frame-rate matching the laser pulse repetition rate. The combustion evolution was studied in terms of spatial distribution and rate of fuel consumption for different engine hardware configurations as well as operating conditions, e.g., different stoichiometries and combustion phasing. Two different piston crown geometries were used for altering the degree of turbulence in the combustion chamber. In addition to the optical investigations, the impact of turbulence effects was also studied by calculating the rate of heat release and combustion phasing from the pressure trace.},
  author       = {Seyfried, Hans and Olofsson, Jimmy and Sjöholm, Johan and Richter, Mattias and Aldén, Marcus and Vressner, Andreas and Hultqvist, Anders and Johansson, Bengt},
  keyword      = {Laser diagnostics
Combustion engines
laser system},
  language     = {eng},
  publisher    = {Society of Automotive Engineers},
  series       = {SAE technical paper series},
  title        = {High-Speed PLIF Imaging for Investigation of Turbulence Effects on Heat Release Rates in HCCI Combustion},
  year         = {2007},
}