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Development of a 0D Model Starting from Different RANS CFD Tumble Flow Fields in Order to Predict the Turbulence Evolution at Ignition Timing
Technical Paper
2014-32-0048
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Faster combustion and lower cycle-to-cycle variability are mandatory tasks for naturally aspirated engines to reduce emission levels and to increase engine efficiency. The promotion of a stable and coherent tumble structure is considered as one of the best way to promote the in-cylinder turbulence and therefore the combustion velocity. During the compression stroke the tumble vortex is deformed, accelerated and its breakdown in smaller eddies leads to the turbulence enhancement process.
The prediction of the final level of turbulence for a particular engine operating point is crucial during the engine design process because it represents a practical comparative means for different engine solutions. The tumble ratio parameter value represents a first step toward the evaluation of the turbulence level at ignition time, but it has an intrinsic limit. The tumble ratio parameter represents the value of the angular velocity of a single macro vortex, while the flow-field is often characterized by multiple vortexes, sometimes some rotating and some counter-rotating.
The idea at the basis of the paper is:
- To develop a quasi-predictive 0D model for defining the final mean level of the turbulence at the ignition time. The model is fed by the curtain intake valve mass flow rate and the intake valve lift trend. In order to validate the 0D model the results were compared versus 3D CFD results.
- To extract from a 3D CFD flow field at IVC the type and the number of the vortexes. The 3D CFD RANS simulations were performed by AVL Fire code v. 2010.
- To demonstrate through some 3D CFD results that the flow field structure was a function only of the engine type and the load condition.
Finally the flow field structure could be used in the 0D model on varying the engine speeds as a means of improvement of the model prediction capability.
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Falfari, S., Forte, C., Brusiani, F., Bianchi, G. et al., "Development of a 0D Model Starting from Different RANS CFD Tumble Flow Fields in Order to Predict the Turbulence Evolution at Ignition Timing," SAE Technical Paper 2014-32-0048, 2014, https://doi.org/10.4271/2014-32-0048.Data Sets - Support Documents
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References
- Falfari , S. , Bianchi , G. M. , Nuti , L. Numerical Comparative Analysis of In-Cylinder Tumble Flow Structures in Small PFI Engines Equipped by Heads Having Different Shapes and Squish Areas Proceedings of ASME Internal Combustion Engine Division, 2012. Spring Technical Conference 10.1115/ICES2012-81095
- Falfari , S. , Brusiani , F. , Bianchi , G. M. Numerical Analysis of In-Cylinder Tumble Flow Structures - Parametric 0D Model Development 2013 Energy Procedia 45 987 996 10.1016/j.egypro.2014.01.104
- Falfari , S. , Brusiani , F. , Pelloni , P. 3D CFD Analysis of the Influence of Some Geometrical Engine Parameters on Small PFI Engine Performances - The Effects on the Tumble Motion and the Mean Turbulent Intensity Distribution 2013 Energy Procedia 45 701 710 10.1016/j.egypro.2014.01.075
- Falfari , S. , Brusiani , F. , and Bianchi , G. Assessment of the Influence of Intake Duct Geometrical Parameters on the Tumble Motion Generation in a Small Gasoline Engine SAE Technical Paper 2012-32-0095 2012 10.4271/2012-32-0095
- Brusiani , F. , Falfari , S. , Cazzoli , G. Tumble motion generation in small gasoline engines: A new methodological approach for the analysis of the influence of the intake duct geometrical parameters 2013 Energy Procedia 45 997 1006 10.1016/j.egypro.2014.01.105
- Blaxill , H. , Downing , J. , Seabrook , J. , and Fry , M. A Parametric Approach to Spark-Ignition Engine Inlet-Port Design SAE Technical Paper 1999-01-0555 1999 10.4271/1999-01-0555
- Gaikwad , S. , Arora , K. , Korivi , V. , and Cho , S. Steady and Transient CFD Approach for Port Optimization SAE Int. J. Mater. Manuf. 1 1 754 762 2008 10.4271/2008-01-1430
- Lee , K. , Bae , C. , Kang , K. The effects of tumble and swirl flows on flame propagation in a four valve S.I. engine Applied Thermal Engineering 27 2007 2122 2130
- Ramajo , D. , Zanotti , A. , Nigro , N. Assessment of a zero-dimensional model of tumble in four-valve high performance engine 2007 International Journal of Numerical Methods for Heat & Fluid Flow 17 8 770 787 10.1108/09615530710825765
- Laget , O. , Zaccardi , J. , Gautrot , X. , Mansion , T. et al. Establishing New Correlations Between In-Cylinder Charge Motion and Combustion Process in Gasoline Engines Through a Numerical DOE SAE Int. J. Engines 3 1 183 201 2010 10.4271/2010-01-0349
- Amer , A. and Reddy , T. Multidimensional Optimization of In-Cylinder Tumble Motion for the New Chrysler Hemi SAE Technical Paper 2002-01-1732 2002 10.4271/2002-01-1732
- Church , W. and Farrell , P. Effects of Intake Port Geometry on Large Scale In-Cylinder Flows SAE Technical Paper 980484 1998 10.4271/980484
- Miller , R. , Newman , C. , Dai , W. , Trigui , N. et al. Up-Front Prediction of the Effects of Cylinder Head Design on Combustion Rates in SI Engines SAE Technical Paper 981049 1998 10.4271/981049
- Baby , X. and Floch , A. Investigation of the In-Cylinder Tumble Motion In a Multi-Valve Engine: Effect of the Piston Shape SAE Technical Paper 971643 1997 10.4271/971643
- Arcoumanis , C. , Godwin , S. , and Kim , J. Effect of Tumble Strength on Combustion and Exhaust Emissions in a Single-Cylinder, Four-Valve, Spark-Ignition Engine SAE Technical Paper 981044 1998 10.4271/981044
- Mittal , M. , Schock , H. A Study of Cycle-to-Cycle Variations and the Influence of Charge Motion Control on In-Cylinder Flow in an IC Engine ASME 2010, Journal of Fluids Engineering 132 051107-1 10.1115/1.4001617
- Huang , R.F. , Lin , K.H. , Yeh , C.-N. , Lan , J. In-cylinder tumble flows and performance of a motorcycle engine with circular and elliptic intake ports Journal of Experiments in Fluids 46 1 January 2009 165 179 10.1007/s00348-008-0551-z
- Lee , K.H. , Lee , C.S. Effects of tumble and swirl flows on turbulence scale near top dead centre in a four-valve spark ignition engine Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 2003 217 607 10.1243/095440703322114988
- Achuth , M. , Metha , P. S. Predictions of tumble and turbulence in four-valve pentroof spark ignition engines Int. Journal of Engine Research 2001 2 209 10.1243/1468087011545442
- Ueda , T. , Okumura , T. , Sugiura , S. , and Kojima , S. Effects of Squish Area Shape on Knocking in a Four-Valve Spark Ignition Engine SAE Technical Paper 1999-01-1494 1999 10.4271/1999-01-1494
- Fujimoto , M. , Iwai , K. , Kataoka , M. , Tabata , M. Effect of combustion chamber shape on tumble flow, squish-generated flow and burn rate Elsevier, JSAE review 23 2002 291 296 10.1016/j.bbr.2011.03.031
- Berntsson , A. , Josefsson , G. , Ekdahl , R. , Ogink , R. et al. The Effect of Tumble Flow on Efficiency for a Direct Injected Turbocharged Downsized Gasoline Engine SAE Int. J. Engines 4 2 2298 2311 2011 10.4271/2011-24-0054
- Schögl , O. , Edtmayer , H. , Schmidt , S. , Leiber , S. et al. Design of a Tumble-Orientated Intake Port Layout for a Gasoline Combustion Process Used in Power Sport Application 2011
- Adomeit , P. , Jakob , M. , Pischinger , S. , Brunn , A. et al. Effect of Intake Port Design on the Flow Field Stability of a Gasoline DI Engine SAE Technical Paper 2011-01-1284 2011 10.4271/2011-01-1284
- Murali Krishna , B. , Mallikarjuna , J. M. Comparative study of in-cylinder tumble flows in an internal combustion engine using different piston shapes - an insight using particle image velocimetry Journal of Experiments in Fluids 48 5 May 2010 863 874 10.1007/s00348-009-0783-6
- Achuth , M. , Mehta , P. S. Prediction of Tumble and Turbulence in Four-Valve Pentroof Spark Ignition Engines International Journal of Engine Research 2001 2 209 10.1243/1468087011545442
- Lafossas , F. , Colin , O. , Le Berr , F. , and Menegazzi , P. Application of a New 1D Combustion Model to Gasoline Transient Engine Operation SAE Technical Paper 2005-01-2107 2005 10.4271/2005-01-2107
- Agarwal , A. , Filipi , Z. S. , Assanis , D. N. , Baker , D. M. Assessment of Single- and Two-Zone Turbulence Formulations for Quasi-Dimensional Modeling of Spark-Ignition Engine Combustion Combustion Science and Technology 136 1 13 39 10.1080/00102209808924163
- Richard , S. , Bougrine , S. , Font , G. , Lafossas , F.-A. , Le Berr , F. On the Reduction of a 3D CFD Combustion Model to Build a Physical 0D Model for Simulating Heat Release, Knock and Pollutants in SI Engines Oil & Gas Science and Technology - Rev. IFP 64 2009 3 223 242 10.2516/ogst/2008055
- Bianchi , G. , Brusiani , F. , Postrioti , L. , Grimaldi , C. et al. CFD Analysis of Injection Timing and Injector Geometry Influences on Mixture Preparation at Idle in a PFI Motorcycle Engine SAE Technical Paper 2007-24-0041 2007 10.4271/2007-24-0041
- Falfari , S. and Bianchi , G. Development of an Ignition Model for S.I. Engines Simulation SAE Technical Paper 2007-01-0148 2007 10.4271/2007-01-0148
- Forte , C. , Bianchi , G. , and Corti , E. Multicycle Simulation of the Mixture Formation Process of a PFI Gasoline Engine SAE Technical Paper 2011-01-2463 2012 10.4271/2011-01-2463
- Forte , C. , Corti , E. , Bianchi , G. , Falfari , S. et al. A RANS CFD 3D Methodology for the Evaluation of the Effects of Cycle By Cycle Variation on Knock Tendency of a High Performance Spark Ignition Engine SAE Technical Paper 2014-01-1223 2014 10.4271/2014-01-1223
- Brusiani , F. , Forte , C. , and Bianchi , G. Assessment of a Numerical Methodology for Large Eddy Simulation of ICE Wall Bounded Non-Reactive Flows SAE Technical Paper 2007-01-4145 2007 10.4271/2007-01-4145
- Jeong , J. , Hussain , F. , Schoppa W. and Kim J. 1997 Coherent structures near the wall in a turbulent channel flow Journal of Fluid Mechanics 332 185 214