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The Influence of Stroke-to-Bore Ratio and Combustion Chamber Design on Formula One Engines Performance
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Abstract
This paper presents a numerical study of the combustion chamber design influence on the performance of racing engines. The analysis has been applied to the Ferrari 10 cylinder 3.0 liter S.I. engine adopted in Formula One racing.
The numerical investigation aimed to asses the influence of stroke-to-bore ratio changes on engine performance within real life design constraints. The effects of the stroke-to-bore ratio on both the volumetric efficiency and the thermal conversion efficiency have been investigated. Flame front area maps, wall areas wetted by burned gases, mean flow field patterns and main turbulent parameters have been compared for two different S/B ratios. Since higher intake and exhaust valve areas per unit displaced volume result in a higher volume of piston bowls, a lower S/B ratio leads to a lower compression ratio, which strongly limits the indicated mean effective pressure. Therefore, in the second part of the paper, an analysis of the influence of the piston shape on combustion process has been performed in order to optimize the imep of the lower S/B ratio engine.
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Bianchi, G., Cantore, G., Mattarelli, E., Guerrini, G. et al., "The Influence of Stroke-to-Bore Ratio and Combustion Chamber Design on Formula One Engines Performance," SAE Technical Paper 980126, 1998, https://doi.org/10.4271/980126.Also In
References
- Pignone, G. A. Vercelli, U. R. ”Motori ad Alta Potenza Specifica” Nada G. Milano 1995
- Filipi, Z. S. Assanis, D. N. ”On Determining The Optimum Stroke-To-Bore Ratio For A Spark Ignition Engine Of Given Displacement,” Proceedings CSAT 1996
- Boretti A.A. Borghi M. Dominici A. Guerrini G. Mattarelli E. “Influence of Intake Port Design on Permeability and Rate of Combustion in a Four Valve High Performance Engine” Proceedings of 2nd International Seminary on High Performance Spark Ignition Engines for Passengers Cars, ATA Technical Paper 95A6008 Milan November 1995
- Siewert, R. M. “Engine Combustion at Large Bor-to-Stroke Ratios” SAE Paper 780968
- Poulos, S.G. Heywood, J.B. “The Effect of Chamber Geometry on Spark Ignition Engine Combustion” SAE Paper 830334
- Mattavi, J. N. ”Effects of Combustion Chamber Design on Combustion in Spark Ignition Engines” SAE Paper 821578
- Davis,, G. C. Tabaczynski, R.J. Belaire, R. C. “The Effect of Intake Valve lift on Turbulence Intensity and Burn rate in SI-Engines” SAE Paper 840030
- Amsden, A. A. ”Kiva3 - A Kiva Program with Block-Structured Mesh for Complex Geometries” Los Alamos National Laboratory 1993
- Paoletti S. “EngAGE, A Multi-Block Environment for Grid Generation” Proceedings of 5th Int. Conf. on ‘Numerical Grid Generation in Computational Field Simulations’ Mississippi State Univerity April 1996
- Nuti M. Nobile P. Papetti F. Paoletti S. “Analysis of the influence of geometrical parameters on the scavenging process in a two-stroke engine” Proceedings SIMAI 96 176 1996
- Cantore, G. Bianchi, G.M. Guerrini, G. Papetti, F “Multidimensional modeling of in-cylinder flows and combustion of a four valve S.I. competition engine” Proceedings of the 3rd International Conference ICE September 1997 Capri (Italy)
- Wilcox, D. C. Rubesin, M. W. “Progress in Turbulence Modeling for Complex Flows Fields Including Effects of Compressibility” NASA Techinal Paper 1517 April 1980
- Launder, B. E. Spaulding, D. B. “Mathematical Models of Turbulence” Academic Press New York 1972
- Morel, T Mansour, N. N. “Modeling of Turbulence in Internal Combustion Engines” SAE Paper 820040 1982
- El-Thary, S.H. “K-ε Equation for Compressibile Reciprocating Engine Flows” AIAA Journal of Energy 7 4 345 353 1983
- Amsden A. A. O’Rourke P. J. Butler “KIVA-II: A Computer Program for Chemically Reacting Flows with Sprays” LA-11560-MS Los Alamos National Laboratory Los Alamos (New Mexico, US) 1989
- Magnussen B. F. Hjertager B. H. “On Mathematical Modelling of Turbulent Combustion with Special Emphasis on Soot Formation and Combustion” Proceedings of 16th Symposium on Combustion, The Combustion Institute 719 727 1976
- Cantore G. Borghi M. Mattarelli E. Boretti A. A. Bianchi G. M. Chinni L. “Numerical simulation of turbulent combustion in a four valve spark ignition engine with CRI/TurboKiva 2.0 code” Proceedings of Spring Technical Conference - Internal Combustion Engine Division of ASME Marietta (Ohio, U.S.) April 1995
- Cantore G. Bianchi G. M. Dominici A. Boretti A.A. “Simulazione numerica del processo di combustione in motori ad elevate prestazioni con codice di calcolo tridimensionale” Proceedings of the Conference Modena Motori: Automobili e Motori High-Tech Modena May 1995
- Jennings M. “Multi-Dimensional Modeling of Turbulent Premixed Charge combustion” SAE Paper 920589 1992
- Hu Z. Whitelaw J. H. Vafidis C. et al. “Correlations between in-cylinder flow, performance and emissions characteristics of a Rover pentroof four-valve engine” Proceedings of International Conference on Combustion in Engines, Tecnology, Applications & Enviroment IMechE 1989 157 164 London 1992
- Hadded O. Denbratt I. “Turbulence Characteristic of Tumbling Air Motion in a Four-Valve S.I. Engines and their Correlation with Combustion Parameters” SAE Paper 910478 1991
- Boretti A.A Borghi M. Marmorini L. Mattarelli E. “Experimental and Computational Methods for Port Design in High Performance Four Valve Spark Ignition Engines” Proceedings of the Conference Modena Motori: Automobili e Motori High-Tech Modena May 1995
- Omori. S. Iwachido K. Motomochi M. Hirako O. “Effect of Intake Port Flow Pattern on the Cylinder Tumbling Air Flow in Multi-Valve SI Engines” SAE Paper 910477 1991
- Kudou H. Yamamoto H. Iida Y. “A Study About In-Cylinder Flow and Combustion in a 4-valve S.I. Engine” SAE Paper 920574 1992
- Wilson N. D. Watkins A. J. Dopson C. “Asymmetric Valve Strategies and Their Effects on Combustion” SAE Paper 930821 1993
- Kent. J. C. Mikulec A. Stein, R. A. et al. “Observations on the Effects of Intake Generated Swirl and Tumble on Combustion Duration” SAE Paper 892096 1989
- Bernocchi A. Sassi L. Bidini G. “Analisi Numerica dell’influenza del moto della carica interno cilindro sulla turbolenza e la velocità di combustione in motori ad accensione comandata” 48 3 95 104 1995
- Alkidas A.C. Suh I. “The Effects of Intake-Flow Configuration on the Heat-Release and Heat-Transfer Characteristic of a Single-Cylinder Four-Valve S.I. Engine” SAE Paper 910296 1991
- Gosman A. D. “Flow Process in Cylinders” Thermodynamics and Gas Dynamics of Internal Combustion Engines 2 Oxford University Press. 1986
- Pinchon P. Le Coz J. Henriot S. “An Experimental and Computational Analysis of the Flow Field in a Four-Valve Spark Ignition Engine - Focus on Cycle-Resolved Turbulence” SAE Paper 900056 1990
- El Tahry S. H. “A Numerical Study on the Effects of Fluid Motion at Inlet-Valve Closure on Subsequent Fluid Motion in a Motored Engine” SAE Paper 820035 1982