This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Single Pulse Planar Laser Induced Fluorescence Imaging of Hydroxyl Radicals in a Spark Ignition Engine
Annotation ability available
Sector:
Language:
English
Abstract
Planar laser induced fluorescence (PLIF) imaging of hydroxyl (OH) radicals is applied to a single cylinder spark ignited internal combustion engine (ICE) to study the development of turbulent flames. A single laser pulse from an excimer laser is formed into a two-dimensional (2-D) light sheet which intersects the flame in the combustion chamber at different delay times after the spark ignition, and 1 mm below the spark plug. The PLIF images are then captured with an intensified charge coupled device (CCD) camera, which is time gated with the laser pulse. The single-laser pulse PLIF images are then stored with a video cassette recorder (VCR) for further analysis. Real-time PLIF images were observed at different delay times after the spark ignition from consecutive engine cycles and at different engine speeds running on propane. Cycle-to-cycle variations were observed. Additionally, the turbulence interaction with the flame front increased as a function of the delay after the spark and the engine speed. The transition from a smooth flame front to a highly wrinkled turbulent flame front is observed. The flame development time decreased as a function of the engine speed. Simultaneous PLIF and elastic (Mie + Rayleigh) scattering images obtained yielded the reaction zone thickness, when liquid iso-octane fuel was used.
Citation
Serpengüzel, A., Hahn, R., and Acker, W., "Single Pulse Planar Laser Induced Fluorescence Imaging of Hydroxyl Radicals in a Spark Ignition Engine," SAE Technical Paper 932701, 1993, https://doi.org/10.4271/932701.Also In
References
- Eckbreth A. C. “Laser Diagnostics for Combustion Temperature and Species,” Abacus, Cambridge, Massachusetts 1988
- -Höinghaus K.K. “Quantitative Laser-Induced Fluorescence: Some Recent Developments in Combustion Diagnostics,” Appl. Phys. B 50 455 461 1990
- Dyer M. J. et al. “Two-Dimensional Imaging of OH Laser Induced Fluorescence in a Flame,” Opt. Lett. 7 382 385 1982
- Druet S. A. J. et al. “CARS Spectroscopy,” Prog. Quantum Electron. 7 1 1981
- Ashford N. M. R. “Multiphoton Probing of Rydberg States,” Mol. Phys. 58 1 1986
- Armstrong N. W. H. et al. “Premixed Turbulent Combustion Flowfield Measurements Using PIV And LST And Their Applications To Flamelet Modeling Of Engine Combustion,” SAE Paper 922322 1992
- Long M. B. et al. “Simultaneous Two-Dimensional Mapping of Species Concentration and Temperature in Turbulent Flames,” Opt. Lett. 10 267 269 1985
- Suntz R. et al. “Two-Dimensional Visualization of Flame Front in an Internal Combustion Engine by Laser Induced Fluorescence of OH Radicals,” Appl. Phys. B 47 287 293 1988
- Felton P. G. et al. “Initial Two-Dimensional Laser Induced Fluorescence Measurements of OH Radicals in an Internal Combustion Engine,” SAE paper 881633 1988
- Baritaud T. A. et al. “Gasoline Distribution Measurements with PLIF in a SI Engine,” SAE paper 922355 1992
- Lawrentz W. et al. “Quantitative 2D LIF Measurements of Air/Fuel Ratios During the Intake Stroke in a Transparent SI Engine,” SAE paper 922320 1992
- Serpengüzel A. et al. “OH Radical Detection in an Optical Engine,” Society of Photo-Optical Instrumentation Engineers Symposia: Laser Applications in Combustion and Combustion Diagnostics Los Angeles, California 1862 158 162 1993
- Marie J. J. et al. “Single-Shot Temperature Measurements by CARS in an I.C. Engine for Normal and Knocking Conditions,” SAE paper 870458 1987
- zur Loye A.O. et al. “Cycle Resolved LDV Measurements in a Motored Diesel Engine and Comparison with K-ε Model Predictions,” SAE paper 890618 1989
- Hu Z. et al. “Flame Propagation Studies In A Four-Valve Pentroof Chamber Spark Ignition Engine,” SAE Paper 922321 1992
- Baritaud T. A. et al. “A 2-D Flame Visualization Technique Applied To The I.C. Engine, SAE Paper 860025 1986
- Kadota T. et al. “Rayleigh Scattering Measurements Of Transient Fuel Vapor Concentration In A Motored Spark Ignition Engine,” SAE Paper 900481 1990
- Bates S. C. “Flame Imaging Studies Of Cycle-By-Cycle Combustion Variation In A SI Four-Stroke Engine,” SAE paper 89086 1989
- Checkel M. D. et al. “Turbulence Effects On Developing Turbulent Flames In A Constant Volume Combustion Chamber,” SAE paper 930867 1993
- Heywood J. B. et al. “Comparison Of Flame Development In A Spark Ignition Engine Fueled With Propane And Hydrogen,” Combust. Sci. and Tech. 38 313 324 1984
- Gatowski J. A. et al. “Flame Photographs in a Spark Ignition Engine,” Combust and Flame 56 71 81 1984
- Copeland R. A. et al. “Rotational Level Dependent Quenching of A 2 Σ + OH and OD,” J. Chem. Phys. 82 4022 4032 1985
- Lucht R. P. et al. “Laser Saturated Fluorescence Measurements of OH Radical Concentrations in Flames,” Combustion and Flame 50 189 205 1983
- Andresen P. et al. “Fluorescence Imaging Inside an Internal Combustion Engine Using Tunable Excimer Lasers,” Appl. Opt. 29 2392 2404 1990
- Heard D. E. et al. Rotational Level Dependence of Predissociation in the v'=3 level of OH A 2 Σ + ,” J. Chem. Phys. 96 4366 4371 1992
- Glassman I. “Combustion,” Academic Press Orlando, Florida 1987
- Leppard W. R. “The Autoignition Chemistries of Primary Reference Fuels, Olefin/Paraffin Binary Mixtures, and Non-Linear Octane Blending,” SAE paper 922325 1992
- Matthews R. D. et al. “Predictions of Cyclic Variability in an SI Engine and Comparisons with Experimental Data,” SAE paper 912345 1991