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1D-3D Coupled Simulation of the Fuel Spray Propagation Inside the Air-Box of a Moto3 Motorbike: Analysis of Spray Targeting and Injection Timing
Technical Paper
2017-01-0520
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In this work an integration between a 1D code (Gasdyn) with a CFD code (OpenFOAM®) has been applied to improve the performance of a Moto3 engine. The four-stroke, single cylinder S.I. engine was modeled, in order to predict the wave motion in the intake and exhaust systems and to study how it affects the cylinder gas exchange process. The engine considered was characterized by having an air induction system with integrated filter cartridge, air-box and intake runner, including two fuel injectors, resulting in a complex air-path from the intake mouth to the intake valves, which presents critical aspects when a 1D modeling is addressed. The exhaust and intake systems have been optimized form the point of view of the wave action. However, due to the high revolution speed reached by this type of engine, the interaction between the gas stream and the fuel spray becomes a key aspect to be addressed in order to achieve the best performance at the desired operating condition. In particular, the evaporation of the fuel injection causes an increase of charge density due to the cooling of the fuel droplets, resulting in a supercharging effect. Moreover, a precise targeting and injection timing of the spray is important in order to avoid liquid film formation in undesired zone, which usually lead to irregular power output. This work proposes an analysis, by means of coupled 1D-3D simulation, of the fuel spray propagation inside the air-box. Spray-wall interaction is considered as well as liquid film formation and evaporation. The final target of the study is the analysis of the fuel injection strategy both on the point of view of targeting and timing, finalized to the optimization of the injection system for the engine which will be used in the next championship.
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Montenegro, G., Della Torre, A., Cerri, T., Onorati, A. et al., "1D-3D Coupled Simulation of the Fuel Spray Propagation Inside the Air-Box of a Moto3 Motorbike: Analysis of Spray Targeting and Injection Timing," SAE Technical Paper 2017-01-0520, 2017, https://doi.org/10.4271/2017-01-0520.Data Sets - Support Documents
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References
- Morel , T. , Silvestri , J. , Goerg , K. , and Jebasinski , R. Modeling of Engine Exhaust Acoustics SAE Technical Paper 1999-01-1665 1999 10.4271/1999-01-1665
- Dolinar A. , Fairbrother R. , Priebsch H.H. , and Bodén H. Experimental investigations on the acoustic properties of some fundamental elements found in automotive exhaust mufflers 2 1361 1369 2007
- Cerri T. , Onorati A. , and Mattarelli E. 1d engine simulation of a small hsdi diesel engine applying a predictive combustion model 371 381 2006
- Bozza , F. and Gimelli , A. A Comprehensive 1D Model for the Simulation of a Small-Size Two-Stroke SI Engine SAE Technical Paper 2004-01-0999 2004 10.4271/2004-01-0999
- 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
- Montenegro G. , Onorati A. , and Della Torre A. The prediction of silencer acoustical performances by 1d, 1d-3d and quasi-3d non-linear approaches Computers and Fluids 71 208 223 2013
- Onorati , A. , Ferrari , G. , D'Errico , G. , and Montenegro , G. The Prediction of 1D Unsteady Flows in the Exhaust System of a S.I. Engine Including Chemical Reactions in the Gas and Solid Phase SAE Technical Paper 2002-01-0003 2002 10.4271/2002-01-0003
- Lucchini , T. , D'Errico , G. , Jasak , H. , and Tukovic , Z. Automatic Mesh Motion with Topological Changes for Engine Simulation SAE Technical Paper 2007-01-0170 2007 10.4271/2007-01-0170
- Lucchini , T. , D'Errico , G. , Brusiani , F. , Bianchi , G. Multi-dimensional modeling of the air/fuel mixture formation process in a PFI engine for motorcycle applications SAE Technical Paper 2009-24-0015 2009 10.4271/2009-24-0015
- Montenegro , G. , Onorati , A. , Piscaglia , F. , and D'Errico , G. Integrated 1D-MultiD Fluid Dynamic Models for the Simulation of I.C.E. Intake and Exhaust Systems SAE Technical Paper 2007-01-0495 2007 10.4271/2007-01-0495
- Montenegro , G. , Della Torre , A. , Cerri , T. , Lenzi , G. Fluid Dynamic and Acoustic Optimization Methodology of a Motorbike Intake Airbox Using Multilevel Numerical CFD Models and Experimental Validation Tests SAE Int. J. Engines 6 3 1731 1744 2013 10.4271/2013-24-0070
- Montenegro , G. , Cerri , T. , Della Torre , A. , Onorati , A. Fluid Dynamic Optimization of a Moto3TM Engine by Means of 1D and 1D-3D Simulations SAE Int. J. Engines 9 1 588 600 2016 10.4271/2016-01-0570
- Onorati , A. , Ferrari , G. , D'Errico , G. , and Montenegro , G. The Prediction of 1D Unsteady Flows in the Exhaust System of a S.I. Engine Including Chemical Reactions in the Gas and Solid Phase SAE Technical Paper 2002-01-0003 2002 10.4271/2002-01-0003
- Onorati , A. , Ferrari , G. , and D'Errico , G. Secondary Air Injection in the Exhaust After-Treatment System of S.I. Engines: 1D Fluid Dynamic Modeling and Experimental Investigation SAE Technical Paper 2003-01-0366 2003 10.4271/2003-01-0366
- Toro E. F. Riemann solvers and numerical methods for fluid dynamics Springer 1997
- Winterbone D. E. and Pearson R. J. Theory of engine manifold design Professional Engineering Publishing London 2000
- OpenFOAM website http://www.openfoam.org OpenCFD Limited 2007
- OpenFoam user and Programmer’s guide OpenCFD Ltd. 2004
- Bracco , F. Modeling of Engine Sprays SAE Technical Paper 850394 1985 10.4271/850394
- Strom Henrik , Lundstram Andreas , and Andersson Bengt Choice of urea-spray models in cfd simulations of urea-scr systems Chemical Engineering Journal 150 1 69 82 2009
- Reitz R. D. Modeling Atomization Processes In High Pressure Vaporizing Sprays Atomization and Spray Technology 3 309 337 1987
- D'Errico , G. , Ettorre , D. , and Lucchini , T. Simplified and Detailed Chemistry Modeling of Constant-Volume Diesel Combustion Experiments SAE Int. J. Fuels Lubr. 1 1 452 465 2009 10.4271/2008-01-0954
- Stanton , D. , Lippert , A. , Reitz , R. , and Rutland , C. Influence of Spray-Wall Interaction and Fuel Films on Cold Starting in Direct Injection Diesel Engines SAE Technical Paper 982584 1998 10.4271/982584
- Kolpakov A. V. Calculation of the Rebound Condition for Colliding Drops of Sharply Different Sizes Kollodn. Zh. 47 1985
- Stanton , D. and Rutland , C. Modeling Fuel Film Formation and Wall Interaction in Diesel Engines SAE Technical Paper 960628 1996 10.4271/960628
- Yarin A. L. and Weiss D. A. Impact of Drops on Solid Surfaces: Self-Similar Capillary Waves, and Splashing as a new Type of Kinematic Discontinuity Journal of Fluid Mechanics 283 1995
- O’Rourke P. J. Statistical Properties and Numerical Implementation of a Model for Droplet Dispersion in a Turbulent Gas Journal of Computational Physics 83 345 360 1989
- Lucchini , T. , D'Errico , G. , Brusiani , F. , Bianchi , G. Multi-dimensional modeling of the air/fuel mixture formation process in a PFI engine for motorcycle applications SAE Technical Paper 2009-24-0015 2009 10.4271/2009-24-0015
- Foucart , H. , Habchi , C. , Le Coz , J. , and Baritaud , T. Development of a Three Dimensional Model of Wall Fuel Liquid Film for Internal Combustion Engines SAE Technical Paper 980133 1998 10.4271/980133
- Varna , A. , Boulouchos , K. , Spiteri , A. , Dimopoulos Eggenschwiler , P. Numerical Modelling and Experimental Characterization of a Pressure-Assisted Multi-Stream Injector for SCR Exhaust Gas After-Treatment SAE Int. J. Engines 7 4 2012 2021 2014 10.4271/2014-01-2822