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Study on Effect of Engine Operating Parameters on Flame Characteristics
Technical Paper
2015-01-0749
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In gasoline direct injection (GDI) engines, air-fuel mixture homogeneity plays a major role on engine performance, especially in combustion and emission characteristics. The performance of the engine largely depends on various engine operating parameters viz., start of injection, duration of injection and spark timing. In order to achieve faster results CFD is becoming a handy tool to optimize and understand the effect of these parameters. Therefore, this study aims on evaluating the two injection parameters viz., single and split injection to evaluate different flame characteristics. Novelty in this study is to define five different parameters which are called α, β, γ, δ and η the details of which are explained in the paper. In order to understand the flame characteristics, these five parameters are found to be very useful.
In the present study, a single-cylinder, two-valve, four- stroke engine which is used in two-wheelers in India is considered for carrying out the CFD analysis. An air-assisted direct in-cylinder fuel injection is considered for the analysis and experiments. Commercial software is used for carrying out the combustion analysis. For specifying the boundary conditions, pressure measurements were made in an actual engine. In order to study the effect of engine performance three different start of injection, duration of injection, spark timings, fuel split ratios are considered. In order to validate the CFD results, measurements of output power is made on the actual engine and is compared with the CFD predictions.
From the results obtained, it is concluded that for better mixing and good combustion, for single injection case, SOI of 198 CAD and 3 ms injection duration, with 20° spark advance found to be the best. Similarly for split injection case, fuel split ratios of 2:1 with SOI of 45 and 250 CADs for first and second injections respectively are found to be the best.
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Authors
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Citation
Sureshkumar, J., Venkitachalam, G., Mallikarjuna, J., and Elayaraja, R., "Study on Effect of Engine Operating Parameters on Flame Characteristics," SAE Technical Paper 2015-01-0749, 2015, https://doi.org/10.4271/2015-01-0749.Also In
References
- Andrews , G. E. , Bradley D. and Lwakabamba S. B. 1975 Turbulence and Turbulent Flame Propagation - A Critical Appraisal Combustion and Flame 285 304
- Balles , E. , Ekchian , J. , and Heywood , J. Fuel Injection Characteristics and Combustion Behavior of a Direct-Injection Stratified-Charge Engine SAE Technical Paper 841379 1984 10.4271/841379
- Chen , C. and Veshagh , A. A Premixed Turbulent Flame Velocity Model Based on Dimensional Reasoning SAE Technical Paper 910077 1991 10.4271/910077
- Chung , S. H. , and Law C. K. 1998 An Integral Analysis of the Structure and Propagation of Stretched Premixed Flames Combustion and Flame 72 325 336
- Colin , O. , Benkenida A. and Angelberger C. 2003 3D Modelling of Mixing, Ignition, and Combustion Phenomena in Highly Stratified Gasoline Engines Oil and Gas Science and Technology - Rev IFP 58 47 62
- Colin , O and Benkenida A. 2004 The 3-Zones Extended Coherent Flame Model (ECFM3Z) for Computing Premixed/Diffusion Combustion Oil and Gas Science and Technology - Rev IFP 59 6 593 609
- Gayed , A. R. G. and Bradley D. 1985 Criteria for Turbulent Propagation Limits of Premixed Flames Combustion and Flame 62 61 68
- Gosman , A. , Tsui , Y. , and Watkins , A. Calculation of Three Dimensional Air Motion in Model Engines SAE Technical Paper 840229 1984 10.4271/840229
- Heywood , J. B. Internal Combustion Engine Fundamentals International McGraw Hill 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
- Meneveau , C. and Poinsot T. 1991 Stretching and Quenching of Flamelets in Premixed Turbulent Combustion Combustion and Flame 86 311 332
- Miyamoto , N. , Ogawa , H. , Shudo , T. , and Takeyama , F. Combustion and Emissions in a New Concept DI Stratified Charge Engine with Two-Stage Fuel Injection SAE Technical Paper 940675 1994 10.4271/940675
- Peters , N 1984 Laminar diffusion flamelet models in non- premixed turbulent combustion Prog. Energy Combust. Sci. 10319 39
- Rodney , J. T. , Trinker F. H. and Shannon B. A. S. 1980 Further Refinement and Validation of a Turbulent Flame Propagation Model for Spark- Ignition Engines Combustion and Flame 111 121
- STAR CCM+, v7.06. 011, User guide and Methodology manuals 2012
- STAR CD+ v4.18, User guide and Methodology Manuals 2012
- Tap , F. A. , Hilbert R. , Thevenin D. and Veynante D. 2003 A Generalized Flame Surface Density Modelling approach for the Auto-Ignition of a Turbulent Non-Premixed System Combustion Theory Modelling 8 165 193
- Mantel Thierry 1994 A New Model of Premixed Wrinkled Flame Propagation Based on a Scalar Dissipation Equation Combustion and Flame 96 443 457