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Study of the Transient Operation of Low Heat Rejection Turbocharged Diesel Engine Including Wall Temperature Oscillations
Technical Paper
2007-01-1091
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
During the last decades, a vivid interest in the low heat rejection (LHR) diesel engine has arisen. In a LHR engine, an increased level of temperatures inside the cylinder is achieved resulting from the insulation applied to the combustion chamber walls. The steady-state LHR engine operation has been studied so far by applying either first- or second-law balances. However, very few works have treated this subject during the very important transient operation, with the results limited to the engine speed response. For this purpose, an experimentally validated simulation code of the thermodynamic cycle of the engine during transient conditions is applied. This takes into account the transient operation of the fuel pump, the development of friction torque using a detailed per degree crank angle sub-model, while the equations for each cylinder are solved individually and sequentially. In this work, two common insulators of various thicknesses are considered for the engine in hand, viz. silicon nitride and plasma spray zirconia. The transient response of various engine (e.g. speed, volumetric efficiency, fuel pump rack position, brake mean effective pressure and specific fuel consumption) and turbocharger variables is depicted and analyzed, with the results compared to the non-insulated transient and the insulated steady-state operation. For a more in-depth analysis of transient engine heat transfer, the interesting phenomenon of the short-term temperature (cyclic) oscillations in the combustion chamber walls during transients needs to be studied. To this aim, the thermodynamic model of the engine is appropriately coupled to a wall periodic heat conduction model, which uses the gas temperature variation as boundary condition throughout the engine cycle after being treated by Fourier analysis techniques. The evolution of many variables during the transient engine cycles, such as the amplitude of oscillation or gradient of temperature swing is thus illustrated. Moreover, the simulation code is expanded in a way to include the second-law balance, as this may prove an interesting alternative to the first-law analysis. It is revealed that after a ramp increase in load, the second-law values unlike the first-law ones are heavily impacted by the insulation scheme applied. Combustion and total engine irreversibilities decrease significantly (up to 24% for the cases examined) with increasing insulation. Unfortunately, this decrease is not transformed into an increase in piston work but rather increases the potential for extra work recovery owing to the higher availability content of the exhaust gas.
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Citation
Rakopoulos, C. and Giakoumis, E., "Study of the Transient Operation of Low Heat Rejection Turbocharged Diesel Engine Including Wall Temperature Oscillations," SAE Technical Paper 2007-01-1091, 2007, https://doi.org/10.4271/2007-01-1091.Also In
References
- Annand, W. J. D. Ma, T. H. ‘Instantaneous Heat Transfer Rates to the Cylinder Head Surface of a Small Compression-Ignition Engine’ Proceedings of the Institution of Mechanical Engineers 185 976 987 1970-71
- Assanis, D.N. Heywood, J.B. ‘Development and Use of a Computer Simulation of the Turbo-Compounded Diesel Engine Performance and Component Heat Transfer Studies’ SAE Paper No. 860329 1986
- Borman, G. Nishiwaki, K. ‘Internal-Combustion Engine Heat Transfer’, Progress in Energy and Combustion Science 13 1 46 1987
- Benson, R.S. Whitehouse, N.D. Internal Combustion Engines Pergamon Press Oxford 1979
- Heywood, J.B. Internal Combustion Engine Fundamentals McGraw-Hill New York 1988
- Bryzik, W. Kamo, R. ‘Tacom/Cummins Adiabatic Engine Program’ SAE Paper No. 830314 1983
- Jennings, M.J. Morel, T. ‘A Computational Study of Wall Temperature Effects on Engine Heat Transfer’ SAE Paper No. 910459 1991
- Alkidas, A.C. ‘Performance and Emissions Achievements with an Uncooled Heavy-Duty, Single-Cylinder Diesel Engine’ SAE Paper No. 890144 1989
- Assanis, D. Wiese, K. Schwartz, E. Bryzik, W. ‘The Effects of Ceramic Coatings on Diesel Engine Performance and Exhaust Emissions’ SAE Paper No. 910460 1991
- Wong, V.W. Bauer, W. Kamo, R. Bryzik, W. Reid, M. ‘Assessment of Thin Thermal Barrier Coatings for I.C. Engines’ SAE Paper No. 950980 1995
- Rakopoulos, C.D. Mavropoulos, G.C. ‘Modeling the Transient Heat Transfer in the Ceramic Combustion Chamber Walls of a Low Heat Rejection Diesel Engine’ International Journal of Vehicle Design 22 195 215 1999
- Rakopoulos, C.D. Giakoumis, E.G. ‘Second-Law Analyses Applied to Internal Combustion Engine Operation’ Progress in Energy and Combustion Science 32 2 47 2006
- Alkidas, A.C. ‘The Application of Availability and Energy Balances to a Diesel Engine’ ASME Transactions, Journal of Engineering for Gas Turbines and Power 110 462 469 1988
- Caton, J.A. ‘On the Destruction of Availability (Exergy) due to Combustion Processes - with Specific Application to Internal-Combustion Engines’ Energy 25 1097 1117 2000
- Flynn, P.F. Hoag, K.L. Kamel, M.M. Primus, R.J. ‘A New Perspective on Diesel Engine Evaluation Based on Second Law Analysis’ SAE Paper No. 840032 1984
- Primus, R.J. Hoag, K.L. Flynn, P.F. Brands, M.C. ‘An Appraisal of Advanced Engine Concepts Using Second Law Analysis Techniques’ SAE Paper No. 841287 1984
- Watson, N. ‘Dynamic Turbocharged Diesel Engine Simulator for Electronic Control System Development’ ASME Transactions, Journal of Dynamic Systems, Measurement and Control 106 27 45 1984
- Winterbone, D.E. ‘Transient Performance’, in J.H. Horlock and D.E. Winterbone (eds.) The Thermodynamics and Gas Dynamics of Internal Combustion Engines II Clarendon Press Oxford 1986
- Rakopoulos, C.D. Giakoumis, E.G. Hountalas, D.T. Rakopoulos, D.C. ‘The Effect of Various Dynamic, Thermodynamic and Design Parameters on the Performance of a Turbocharged Diesel Engine Operating under Transient Load Conditions’ SAE Paper No. 2004-01-0926 2004
- Rakopoulos, C.D. Giakoumis, E.G. ‘Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions’ SAE Paper No. 2006-01-0884 2006
- Rakopoulos, C.D. Giakoumis, E.G. ‘Sensitivity Analysis of Transient Diesel Engine Simulation’ Proceedings of the Institution of Mechanical Engineers, Part D, Journal of Automobile Engineering 220 89 101 2006
- Keribar, R. Morel, T. ‘Thermal Shock Calculations in I.C. Engines’ SAE Paper No. 870162 1987
- Schorn, N. Pischinger, F. Schulte, H. ‘Computer Simulation of Turbocharged Diesel Engines under Transient Conditions’ SAE Paper No. 870723 1987
- Rakopoulos, C.D. Hountalas, D.T. Mavropoulos, G.C. Giakoumis, E.G. ‘An Integrated Transient Analysis Simulation Model Applied in Thermal Loading Calculations of an Air-Cooled Diesel Engine under Variable Speed and Load Conditions’ SAE Paper No. 970634 , 1997. Also in SAE Transactions, Journal of Engines 106 923 939 1997
- Rakopoulos, C.D. Hountalas, D.T. Mavropoulos, G.C. ‘Modeling the Structural Thermal Response of an Air-Cooled Diesel Engine under Transient Operation Including a Detailed Thermodynamic Description of Boundary Conditions’ SAE Paper No. 981024 1998
- Rakopoulos, C.D. Antonopoulos, K.A. Rakopoulos, D.C. Giakoumis, E.G. ‘Investigation of the Temperature Oscillations in the Cylinder Walls of a Diesel Engine with Special Reference to the Limited Cooled Case’ International Journal of Energy Research 28 977 1002 2004
- Rakopoulos, C.D. Rakopoulos, D.C. Mavropoulos, G.C. Giakoumis, E.G. ‘Experimental and Theoretical Study of the Short Term Response Temperature Transients in the Cylinder Walls of a Diesel Engine at Various Operating Conditions’ Applied Thermal Engineering 24 679 702 2004
- Yamada, Y. Emi, M. Ishii, H. Suzuki, Y. Kimura, S. Enomoto, Y. ‘Heat Loss to the Combustion Chamber Wall with Deposit in D.I. Diesel Engine: Variation of Instantaneous Heat Flux on Piston Surface with Deposit’ JSAE Review 23 415 421 2002
- Alkidas, A.C. Myers, J.P. ‘Transient Heat-Flux Measurements in the Combustion Chamber of a Spark-Ignition Engine’ ASME Transactions, Journal of Heat Transfer 104 62 67 1982
- Alkidas, A.C. Cole, R.M. ‘Transient Heat-Flux Measurements in a Divided-Chamber Diesel Engine’ ASME Transactions, Journal of Heat Transfer 107 439 444 1985
- 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
- Whitehouse, N.D. Way, R.G.B. ‘Rate of Heat Release In Diesel Engines and its Correlation with Fuel Injection Data’ Proceedings of the Institution of Mechanical Engineers, Part 3J 184 17 27
- Gebhart, B. Heat Transfer McGraw-Hill New York 1971
- Myers, G.E. Analytical Methods in Conduction Heat Transfer McGraw-Hill New York 1971
- Eckert, E.R.G. Drake, R.M. Jr. Heat and Mass Transfer 2nd edn McGraw-Hill New York 1959
- Churchill, R.V. Fourier Series and Boundary Value Problems McGraw-Hill New York 1963
- Rakopoulos, C.D. Hountalas, D.T. ‘A Simulation Analysis of a DI Diesel Engine Fuel Injection System Fitted with a Constant Pressure Valve’ Energy Conversion and Management 37 135 150 1996
- Taraza, D. Henein, N. Bryzik, W. ‘Friction Losses in Multi-Cylinder Diesel Engines’ SAE Paper No. 2000-01-0921 2000
- Stanley, R. Taraza, D. Henein, N. Bryzik, W. ‘A Simplified Model of the Piston Ring Assembly’ SAE Paper No. 1999-01-0974 1999
- Scwartz, E. Reid, M. Bryzik, W. Danielson, E. ‘Combustion and Performance Characteristics of a Low Heat Rejection Engine’ SAE Paper No. 930988 1993
- Alkidas, A.C. ‘The Use of Availability and Energy Balances in Diesel Engines’ SAE Paper No. 890822 1989
- Rakopoulos, C.D. Andritsakis, E.C. Kyritsis, D.C. ‘Availability Accumulation and Destruction in a DI Diesel Engine with Special Reference to the Limited Cooled Case’ Heat Recovery Systems and CHP 13 261 276 1993
- Rakopoulos, C.D. Giakoumis, E.G. ‘Availability Analysis of a Turbocharged Diesel Engine Operating under Transient Load Conditions’ Energy 29 1085 1104 2004
- Rakopoulos C.D. Giakoumis, E.G. ‘Parametric Study of Transient Turbocharged Diesel Engine Operation from the Second-Law Perspective’ SAE Paper No. 2004-01-1679 2004
- Van Gerpen, J.H. Shapiro, H.N. ‘Second-Law Analysis of Diesel Engine Combustion’ ASME Transactions, Journal of Engineering for Gas Turbines and Power 112 129 137 1990