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CFD Investigation of the Thermo-Mechanical Behavior of a High Performance Bike Engine
Technical Paper
2011-32-0525
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The paper presents a combined experimental and numerical activity carried out to improve the accuracy of conjugate heat transfer CFD simulations of a high-performance S.I. motorbike engine water cooling jacket. The computational domain covers both the coolant jacket and the surrounding metal components (head, block, gasket, valves, valve seats, valve guides, cylinder liner, spark plug).
In view of the complexity of the modeled geometry, particular care is required in order to find a tradeoff between the accuracy and the cost-effectiveness of the numerical procedure. The CFD-CHT simulation of water cooling jackets involves many complex physical phenomena: in order to setup a robust numerical procedure, the contribution of some relevant CFD parameters and sub-models was discussed by the authors in previous publications and is referred to [1, 2, 3, 4].
Among the formers, the effects of a proper set of boundary conditions and a detailed representation of the physical properties of the involved materials were evaluated. Among the latter, the contribution of a two-phase approach taking into account the effects of phase transition within the engine coolant was considered.
The CFD-CHT setup is now applied to investigate and understand the origin of a critical engine behavior occurring at the engine test bench under a severe reliability test. Additional sub-models are introduced and their impact on the results is discussed. Different engine operations are modeled and a detailed analysis of the many thermo-mechanical factors influencing the engine fatigue strength is carried out.
At the end of the process, CFD simulations are able to correctly capture and understand the origin of the engine failure, thus leading to a faster and more effective design modification.
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Fontanesi, S., Cicalese, G., Fantoni, S., and Rosso, M., "CFD Investigation of the Thermo-Mechanical Behavior of a High Performance Bike Engine," SAE Technical Paper 2011-32-0525, 2011, https://doi.org/10.4271/2011-32-0525.Also In
References
- Cantore, G. Fontanesi, S. Gagliardi, V. Malaguti, S. Baldini, A. Giacopini, M. Strozzi, A. Rosi, R. “Optimization of a cooling circuit in an internal combustion engine for marine applications” SAE Paper 2005-24-49
- Carpentiero, D. Fontanesi, S. Gagliardi, V. Malaguti, S. et al. “Thermo-mechanical analysis of an engine head by means of integrated CFD and FEM,” SAE Transactions - Journal of Engines 116 2007 10.4271/2007-24-0067
- Fontanesi, S. McAssey, E. V. ‘Experimental and numerical investigation of conjugate heat transfer in a HSDI Diesel engine water cooling jacket’ SAE Paper 2009-01-0703
- Fontanesi, S. Cicalese, G. d'Adamo, A. Pivetti, G. “Validation of a CFD methodology for the analysis of conjugate heat transfer in a high performance SI engine” SAE ICE2011 Capri Sptember 2011
- Assanis, D. A. “Effect of combustion chamber insulation on the performance of a low heat rejection diesel engine with exhaust heat recovery” Heat Recovery Systems and CHP 9 475 484 1989
- Rakopoulos, C. D. Mavropoulos, G. C. “Experimental instantaneous heat fluxes in the cylinder head and exhaust manifold of an air-cooled diesel engine” Energy Conversion and Management 41 1265 1281 2000
- Rakopoulos, C. Hountalas, D. “Development of New 3-D Multi-Zone Combustion Model for Indirect Injection Diesel Engines with a Swirl Type Prechamber,” SAE Transactions - Journal of Engines 109 2000 10.4271/2000-01-0587
- Shih, T.-H. Liou, W.W. Shabbir, A. Yang, Z. Zhu, J. 1994 “A New k- Eddy Viscosity Model for High Reynolds Number Turbulent Flows - Model Development and Validation” NASA TM 106721
- Rohsenow, W. M. “A Method of Correlation Heat Transfer Data for Surface Boiling of Liquid” Trans. ASME 74 969
- Plesset, M. S. Prosperetti, A. “Bubble Dynamics and Cavitation” Annual Review of Fluid Mechanics 9 145 185
- Sauer, J. “Instationaer kavitierende Stroemungen - Ein neues Modell, basierend auf Fron Capturing VOF und Blasendynamik” Dissertation Universitaet Karlsruhe 2000