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Image Processing for Early Flame Characterization and Initialization of Flamelet Models of Combustion in a GDI Engine
Technical Paper
2015-24-2405
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Ignition and flame inception are well recognised as affecting performance and stable operation of spark ignition engines. The very early stage of combustion is indeed the main source of cycle-to-cycle variability, in particular in gasoline direct injection (GDI) engines, where mixture formation may lead to non-homogenous air-to-fuel distributions, especially under some speed and load conditions.
From a numerical perspective, 3D modelling of combustion within Reynolds Averaged Navier Stokes (RANS) approaches is not sufficient to provide reliable information about cyclic variability, unless proper changes in the initial conditions of the flow transport equations are considered. Combustion models based on the flamelet concept prove being particularly suitable for the simulation of the energy conversion process in internal combustion engines, due to their low computational cost. These models include a transport equation for the flame surface density, which needs proper initialization. A flame collocation is indeed to be properly made when starting the calculations, often just based on the user's skill and without resorting to any quantitative data derived from experiments. However, the way to define initial conditions for cyclic variability prediction is often based on just statistical considerations.
This work aims at exploiting information derived from images collected in a single cylinder 4-stroke GDI engine to properly collocate the flame at the start of the combustion calculation. The considered engine is optically accessible through a wide fused-silica window fixed on the piston crown having a Bowditch design. Image processing methodologies are applied to evaluate local and integral luminous intensity, and flame morphology parameters. The collected data allows improving the numerical simulation and gaining hints about the main parameters defining the engine cyclic variability.
Authors
Citation
Costa, M., Piazzullo, D., Sorge, U., Merola, S. et al., "Image Processing for Early Flame Characterization and Initialization of Flamelet Models of Combustion in a GDI Engine," SAE Technical Paper 2015-24-2405, 2015, https://doi.org/10.4271/2015-24-2405.Also In
References
- Heywood , J. B. Internal Combustion Engine Fundamentals McGrawHill Book Co. 1988
- Keck , J. , Heywood , J. , and Noske , G. Early Flame Development and Burning Rates in Spark Ignition Engines and Their Cyclic Variability SAE Technical Paper 870164 1987 10.4271/870164
- Galloni , E. Analyses about parameters that affect cyclic variation in a spark ignition engine Applied Thermal Engineering 29 5 1131 1137 2008
- Costa , M. , Marchitto , L. , Merola , S. S. , Sorge , U. Study of mixture formation and early flame development in a research GDI (gasoline direct injection) engine through numerical simulation and UV-digital imaging Energy 77 88 96 2014
- Mantel , T. Three dimensional study of flame kernel formation around a spark plug SAE Technical Paper no. 920587 1992
- Johansson , B. Cycle to Cycle Variations in S.I. Engines - The Effects of Fluid Flow and Gas Composition in the Vicinity of the Spark Plug on Early Combustion SAE Technical Paper 962084 1996 10.4271/962084
- Sawamoto , K. , Kawamura , Y. , Kita , T. , and Matsushita , K. Individual Cylinder Knock Control by Detecting Cylinder Pressure SAE Technical Paper 871911 1987 10.4271/871911
- Litak , G. , Kaminski , T. , Czarnigowski , J. , Grzegorz , A. K. et al. Combustion process in a spark ignition engine: analysis of cyclic peak pressure and peak pressure angle oscillations Meccanica 44 1 1 11 2009
- Ozdor , N. , Dulger , M. , and Sher , E. Cyclic Variability in Spark Ignition Engines A Literature Survey SAE Technical Paper 940987 1994 10.4271/940987
- Salvi , B.L. , Subramanian , K. A. Experimental investigation and phenomenological model development of flame kernel growth rate in a gasoline fuelled spark ignition engine Applied Energy 139 93 103 2015
- Burluka , A.A. , El-Dein Hussin , A. M. T. A. , Ling , Z.-Y. , Sheppard , C.G.W. Effects of large-scale turbulence on cyclic variability in spark-ignition engine Experimental Thermal and Fluid Science 43 13 22 2012
- Etheridge , J. , Mosbach , S. , Kraft , M. , Wuet , H. et al. Modelling cycle to cycle variations in an SI engine with detailed chemical kinetics Combustion and Flame 158 1 179 188 2011
- Granet , V. , Vermorel , O. , Lacour , C. , Enaux , B. et al. Large-Eddy Simulation and experimental study of cycle-to-cycle variations of stable and unstable operating points in a spark ignition engine Combustion and Flame 159 4 1562 1575 2012
- Enaux , B. , Granet , V. , Vermorel , O. , Lacour , C. et al. LES study of cycle-to-cycle variations in a spark ignition engine Proceedings of the combustion Institutte 33 2 3115 3122 2011
- Hasse , C , Sohm , V , Durst , B. Detached eddy simulation of cyclic large-scale fluctuations in a simplified engine setup Int J Heat Fluid Flow 30 1 32 43 2009
- Hasse , C , Sohm , V , Durst B. Numerical investigation of cyclic variations in gasoline engines using a hybrid URANS/LES modelling approach Comput Fluids 39 1 25 48 2010
- Di Mare , F. , Knappstein , R. Statistical analysis of the flow characteristics and cyclic variability using Proper Orthogonal Decomposition of highly resolved LES in internal combustion engines Computers & Fluids 105 101 112 2014
- Fontanesi , S. , D'Adamo , A. , Paltrinieri , S. , Cantore , G. et al. Assessment of the Potential of Proper Orthogonal Decomposition for the Analysis of Combustion CCV and Knock Tendency in a High Performance Engine SAE Technical Paper 2013-24-0031 2013 10.4271/2013-24-0031
- Parker , J. R. 2010 Algorithms for image processing and computer vision John Wiley & Sons
- Sonka , M. , Hlavac , V. , & Boyle , R. 2014 Image processing, analysis, and machine vision Cengage Learning
- Mitchell , H. B. 2010 Image Thresholding. In Image Fusion 155 161 Springer Berlin - Heidelberg
- Otsu N. A threshold selection method from gray-level histogram IEEE Transactions on System Man Cybernetics SMC-9 1 62 66 1979
- Xu , X. , Xu , S. , Jin , L. , Song , E. Characteristic analysis of Otsu threshold and its applications Pattern recognition letters 32 7 956 961 2011
- Zhang , Y. J. 1996 A survey on evaluation methods for image segmentation Pattern recognition 29 8 1335 1346
- Lee , J. S. 1980 Digital image enhancement and noise filtering by use of local statistics Pattern Analysis and Machine Intelligence, IEEE Transactions on 2 165 168
- Xu , R. , & Di Guida , O. A. 2003 Comparison of sizing small particles using different technologies Powder Technology 132 2 145 153
- Huh , KY , Gosman , A.D. International conference on multiphase flows, a phenomenological model of diesel spray atomization Tsukuba, Japan 1991
- O'Rourke , P.J. , Bracco , F.V. Modeling of drop interactions in thick sprays and a comparison with experiments London Institution of Mechanical Engineers, (IMECHE) 1980
- Nordin , W.H. Complex modeling of diesel spray combustion PhD thesis Chalmers University of Technology 2001
- Dukowicz , J.K. Quasi-steady droplet change in the presence of convection [Los Alamos report LA7997-MS]; Informal report Los Alamos Scientific Laboratory 1979
- Costa , M , Sorge , U , Allocca , L. CFD optimization for GDI spray model tuning and enhancement of engine performance Adv Eng Softw 49 43 53 2012
- Kuhnke , D. Spray Wall Interaction Modeling by dimensionless Data Analysis PhD Thesis Darmstadt 2004
- Colin , O. , Benkenida , A. , Angelberger , C. 3D modeling of mixing, ignition and combustion phenomena in highly stratified gasoline engines Oil Gas Sci Technol e Rev IFP Energies Nouvelles 58 47 62 2003
- Zeldovich , Y.B. , Sadovnikov , P.Y. , Frank-Kamenetskii , D.A. Oxidation of nitrogen in combustion Shelef M. Moscow-Leningrad Academy of Sciences of USSR, Institute of Chemical Physics 1947