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Multiphase CFD-CHT Analysis and Optimization of the Cooling Jacket in a V6 Diesel Engine
Technical Paper
2010-01-2096
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The paper presents a numerical activity directed at the analysis and optimization of internal combustion engine water cooling jackets, with particular emphasis on the fatigue-strength assessment and improvement.
In the paper, full 3D-CFD and FEM analyses of conjugate heat transfer and load cycle under actual engine operation of a single bank of a current production V6 turbocharged diesel engine are reported.
A highly detailed model of the engine, made up of both the coolant galleries and the surrounding metal components, i.e., the engine head, the engine block, the gasket, the valve guides and valve seats, is used on both sides of the simulation process to accurately capture the influence of the cooling system layout under thermal and load conditions as close as possible to actual engine operations.
Concerning the CFD side, a 50-50 binary mixture of ethylene-glycol and water is used in order to correctly reproduce the coolant behavior, while boundary conditions are derived from a combination of experimental measurements and a CFD-1D model of the whole engine.
In order to find a proper CFD setup for the optimization of the thermal behavior of the engine, a preliminary comparison between experimental temperature distribution within the engine head and CFD forecasts is carried out. Eight thermocouples are used to measure the engine head local temperature at some critical locations.
Among the many competing numerical sub-models involved in the CFD simulations, particular attention is devoted to the modeling of phase transition and vapor nuclei formation within the coolant galleries.
Concerning the FEM side, thermo-mechanical analyses are carried out aiming at addressing the design optimization of the engine in terms of fatigue strength. In view of the wide range of thermal and load conditions, both high-cycle and low-cycle fatigue must be properly characterized by means of ad-hoc criteria. An energy-based criterion specifically suited for low-cycle fatigue regions is therefore superimposed to well-established S-N o ε-N criteria for the high cycle fatigue regions.
The proposed methodology shows very promising results in terms of point-wise detection of possible engine failures and proves to be an effective tool for the accurate thermo-mechanical characterization of internal combustion engines under actual life-cycle operations.
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Fontanesi, S., Cicalese, G., and Giacopini, M., "Multiphase CFD-CHT Analysis and Optimization of the Cooling Jacket in a V6 Diesel Engine," SAE Technical Paper 2010-01-2096, 2010, https://doi.org/10.4271/2010-01-2096.Also In
References
- 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 Technical Paper 2007-24-0067 2007 10.4271/2007-24-0067
- Fontanesi, S. Carpentiero, D. Malaguti, S. Giacopini, M. et al. “A New Decoupled CFD and FEM Methodology for the Fatigue Strength Assessment of an Engine Head,” SAE Technical Paper 2008-01-0972 2008 10.4271/2008-01-0972
- 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.D. Hountalas, D.T. “Development of New 3-D Multi-Zone Combustion Model for Indirect Injection Diesel Engines with a Swirl Type Prechamber,” SAE Technical Paper 2000-01-0587 2000 10.4271/2000-01-0587
- Skelton, R. P. “Energy criteria for high temperature low cycle fatigue.” 1991 Mat. Sci Tech. 7 427 439
- Charkaluk, E. Constantinescu, A. Bignonnet, A. Van Dang, K. “On a failure criterion for thermomechanical multiaxial low cycle fatigue and its industrial application” Proceedings of Low Cycle Fatigue and Elasto-Plastic Behaviour RIe, K.T. Portella, D. 5-11 September 1998 Garmisch-Partenkirschen Elsevier 815 821
- Charkaluk, E. Constantinescu, A. “Energetic approach in thermomechanical fatigue for silicon molybdenum cast-iron” 2000 Mater high Temp. 17 373 380
- Thomas, J. J. Verger, L. Bignonnet, A. Charkaluk, E. “Thermomechanical design in the automotive industry” 2004 Fatigue Fract. Engng. Mater. Struct. 27 887 895
- Chaboche, J. L. “Time-Independent constitutive theories for cyclic plasticity” 1986 International Journal of Plasticity 2 2
- Chaboche, J. L. “Constitutive equations for cyclic plasticity and cyclic viscoplasticity” 1989 International Journal of Plasticity 5 247 302
- Menter, F. R. ‘Zonal two equation k-ω turbulence models for aerodynamic flows’ Proc. 24th Fluid Dynamics Conf Orlando, Florida, USA 6-9 July
- Gollin, M. McAssey, E.V. Stinson, C. “Comparative Performance of Ethylene Glycol/Water and Propylene Glycol/Water Coolants in the Convective and Forced Flow Boiling Regimes,” SAE Technical Paper 950464 1995 10.4271/950464
- Fontanesi, S. McAssey, E.V. “Experimental and Numerical Investigation of Conjugate Heat Transfer in a HSDI Diesel Engine Water Cooling Jacket,” SAE Technical Paper 2009-01-0703 2009 10.4271/2009-01-0703
- Rohsenow, W. M. “A Method of Correlation Heat Transfer Data for Surface Boiling of Liquid” Trans. ASME 74 969
- LeFeuvre, T. Myers, P.S. Uyehara, O.A. “Experimental Instantaneous Heat Fluxes in a Diesel Engine and Their Correlation,” SAE Technical Paper 690464 1969 10.4271/690464
- Yoshida, M. Harigaya, Y. Sato, K. “Variation of heat flux through a combustion chamber wall of prechamber type Diesel engine” Bulletin of JSME 25 201 1982
- Kumar, P. Ravi Srinivas, P. N. Nelson, J. E. B. Rao, S. S. “Experimental studies on energy appropriation in a single cylinder Diesel engine”
- Rakopoulos, C. D. Giakoumis, E. G. “Development of cumulative and availability rate balances in a multi cylinder turbocharged indirect injection Diesel engine” Energy Convers. Mgmt 38 4
- Borgnakke, C. Arpaci, V.S. Tabaczynski, R.J. “A Model for the Instantaneous Heat Transfer and Turbulence in a Spark Ignition Engine,” SAE Technical Paper 800287 1980 10.4271/800287
- Fisher, P. Dannbauer, H. Unger, B. “Fatigue analysis to accelerate design process of a diesel engine” Engineering/Technologie Zentrum Steyr, SAT, Steyr Daimler Puch AG Steyr, Austria
- Finlay, I.C. Gallacher, G.R. Biddulph, T.W. Marshall, R.A. “The Application of Precision Cooling to the Cylinder-Head of a Small, Automotive, Petrol Engine,” SAE Technical Paper 880263 1988 10.4271/880263
- Norris, P.M. Wepfer, W. Hoag, K.L. Courtine-White, D. “Experimental and Analytical Studies of Cylinder Head Cooling,” SAE Technical Paper 931122 1993 10.4271/931122
- Lee, H.S. O'Neill, A.T. “Comparison of Boiling Curves Between a Standard S.I. Engine and a Flow Loop for a Mixture of Ethylene Glycol and Water,” SAE Technical Paper 2006-01-1231 2006 10.4271/2006-01-1231
- Fisher, P. Dannbauer, H. Unger, B. “Fatigue analysis to accelerate design process of a diesel engine” Engineering/Technologie Zentrum Steyr, SAT, Steyr Daimler Puch AG Steyr, Austria
- Van Dang, K. Cailletaud, G. Flavenot, J. F. Douaron, A. Le Lieurade, H. P. “Criterion for High-Cycle Fatigue Failure Under Multiaxial Loading” Biaxial and Multiaxial Fatigue, EGF 3 Brown, M. W. Miller, K. J. 1989 Mechanical Engineering Publications London 459 478
- Dang Van, K. Griveau, B. Message, O. “On a New Multiaxial Fatigue Limit Criterion: Theory and Application” Biaxial and Multiaxial Fatigue, EGF 3 Brown, M. W. Miller, K. J. 1989 Mechanical Engineering Publications London 479 496