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The HCCI Combustion Process in a Single Cycle - Speed Fuel Tracer LIF and Chemiluminescence Imaging
Technical Paper
2002-01-0424
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The Homogeneous Charge Compression Ignition (HCCI) combustion progress has been characterized by means of high-speed fuel tracer Planar Laser Induced Fluorescence (PLIF) combined with simultaneous chemiluminescence imaging. Imaging has been conducted using a high-speed laser and detector system. The system can acquire a sequence of eight images within less than one crank angle. The engine was run at 1200 rpm on iso-octane or ethanol and a slight amount of acetone was added as a fuel tracer, providing a marker for the unburned areas. The PLIF sequences showed that, during the first stage of combustion, a well distributed decay of fuel concentration occurs. During the later parts of the combustion process the fuel concentration images present much more structure, with distinct edges between islands of unburned fuel and products. The transition between the evenly distributed fuel oxidation in the beginning and the large structures at the end, is most likely the result of a gradual amplification of small temperature inhomogeneities and an expansion of burned gas compressing the unburned.
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Authors
- Anders Hultqvist - Div. of Combustion Engines, Dept. of Heat and Power Engrg., Lund Institute of Technology
- Magnus Christensen - Div. of Combustion Engines, Dept. of Heat and Power Engrg., Lund Institute of Technology
- Bengt Johansson - Div. of Combustion Engines, Dept. of Heat and Power Engrg., Lund Institute of Technology
- Mattias Richter - Div. of Combustion Physics, Lund Institute of Technology
- Jenny Nygren - Div. of Combustion Physics, Lund Institute of Technology
- Johan Hult - Div. of Combustion Physics, Lund Institute of Technology
- Marcus AldJn - Div. of Combustion Physics, Lund Institute of Technology
Topic
Citation
Hultqvist, A., Christensen, M., Johansson, B., Richter, M. et al., "The HCCI Combustion Process in a Single Cycle - Speed Fuel Tracer LIF and Chemiluminescence Imaging," SAE Technical Paper 2002-01-0424, 2002, https://doi.org/10.4271/2002-01-0424.Also In
Homogeneous Charge Compression Ignition (Hcci) Combustion 2002
Number: SP-1688; Published: 2002-03-04
Number: SP-1688; Published: 2002-03-04
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