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Simultaneous OH- and Formaldehyde-LIF Measurements in an HCCI Engine
Technical Paper
2003-01-3218
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Simultaneous OH- and formaldehyde LIF measurements have been performed in an HCCI engine using two laser sources working on 283 and 355 nm, respectively. Two ICCD camera systems, equipped with long-pass filters, were used to collect the LIF signals. The simultaneous images of OH and formaldehyde were compared with heat-release calculated from the pressure-trace matching the cycle for the LIF measurements.
The measurements were performed on a 0.5 l single-cylinder optical engine equipped with port-fuel injection system. A blend of iso-octane and n-heptane was used as fuel and the compression ratio was set to 12:1. The width of the laser sheet was 40 mm and hence covered approximately half of the cylinder bore.
At some 20 CAD BTDC low temperature reactions is present and formaldehyde is formed. The formaldehyde signal is then rather constant until the main heat-release starts just before TDC, where the signal decreases rapidly to low values. From some 15 CAD to 5 CAD BTDC the formaldehyde is uniformly distributed in the imaged area. As formaldehyde decreases, OH increases and follows the main rate of heat release curve, though with a slight lag in phase. Thereafter OH is formed in the areas from which the formaldehyde has disappeared and the OH signal is present to some 20 CAD ATDC.
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Authors
- Leif Hildingsson - Division of Combustion Engines, Lund Institute of Technology
- Bengt Johansson - Division of Combustion Engines, Lund Institute of Technology
- Robert Collin - Division of Combustion Physics, Lund Institute of Technology
- Jenny Nygren - Division of Combustion Physics, Lund Institute of Technology
- Mattias Richter - Division of Combustion Physics, Lund Institute of Technology
- Marcus Aldén - Division of Combustion Physics, Lund Institute of Technology
Citation
Collin, R., Nygren, J., Richter, M., Aldén, M. et al., "Simultaneous OH- and Formaldehyde-LIF Measurements in an HCCI Engine," SAE Technical Paper 2003-01-3218, 2003, https://doi.org/10.4271/2003-01-3218.Also In
References
- Hultqvist A. Christensen M. Johansson B. Franke A. Richter M. Aldén M. “A Study of the Homogeneous Charge Compression Ignition Combustion Process by Chemiluminescence Imaging” SAE 1999-01-3680
- Christensen M. Hultqvist A. Johansson B. “Demonstrating the Multi Fuel Capability of a Homogeneous Charge Compression Ignition Engine with Variable Compression Ratio” SAE 1999-01-3679
- Onishi S. Hong Jo S. Shoda K. Do Jo P. Kato S. “Active Thermo-Atmosphere Combustion (ATAC) - A New Combustion Process for Internal Combustion Engines” SAE 790501
- Olsson J-O. Tunestal P. Johansson B. “Closed-Loop Control of an HCCI Engine” SAE 2001-01-1031
- Olsson J-O. Tunestal P. Haraldsson G. Johansson B. “A Turbo Charged Dual Fuel HCCI Engine” SAE 2001-01-1896
- Schießl R. Dreizler A. Maas U. Grant A. Ewart P. “Double-Pulse PLIF imaging of self-ignition centers in an SI engine” SAE 2001-01-1925
- Kosaka H. Drewes V. H. Catalfamo L. Aradi A. A. Iida N. Kamimoto T. “Two-Dimensional Imaging of Formaldehyde Formed During the Ignition Process of a Diesel Fuel Spray” SAE 2000-01-0236
- Graf N. Gronki J. Schulz C. Baritaud T. Cherel J. Duret P. Lavy J. “In-cylinder Combustion Visualization in an Auto-Igniting Engine using Fuel Tracer- and Formaldehyde-LIF Imaging” SAE 2001-01-1924
- Richter M. Franke A. Aldén M. Hultqvist A. Johansson B. “Optical Diagnostics Applied to a Naturally Aspirated Homogeneous Charge Compression Ignition Engine” SAE 1999-01-3649
- Brackmann C. Nygren J. Bai X. Li Z. Bladh H. Axelsson B. Denbratt I. Koopmans L. Bengtsson P.-E. Aldén M. “Laser-Induced Fluorescence of Formaldehyde in Combustion using Third-Harmonic Nd:YAG Laser Excitation” Spectrochimica Acta Part A 2003
- Metz T. Bai X. Ossler F. Aldén M. “Fluorescence lifetimes of formaldehyde (H 2 CO) in the à 1 A 2 →X 1 A 1 band system at elevated temperatures and pressures” Spectrochimica Acta Part A 2003