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ExpEngine: A Matlab® Add-On for the Simulation of the Combustion Cycle in a SI Engine Using Wet Ethanol
Technical Paper
2015-36-0481
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The mathematical modeling and simulation of an SI engine combustion cycle has contributed for its development, leading to the improvement of the engine purpose to convert the chemical energy of a fuel into mechanical energy through the movement of a piston. The simulation of this models allows the efficiency evaluation of the fuel combustion by generating performance parameters. The Matlab® software, a high-level language and interactive environment, were used for the creation of an add-on based on graphical user interface (GUI), capable of simulating the combustion cycle of a SI engine fuelled by wet ethanol with user-supplied initial parameters. A two-zone model with adaptive heat transfer correlations, including the correlations of Woschni, Hohenberg, Sitkei, Annand and Eichelberg, were implemented for the calculations of the combustion cycle, considering an “unburned” zone, in which the fuel-air mixture has not yet reacted, and a “burned” zone, which consists in the combustion products. The resultant add-on, called ExpEngine (for Experimental Engine), is capable of simulating pressure and temperature gradients as a function of the crank angle, alongside with indicated performance parameters such as IMEP, power, torque, fuel specific consumption, thermal efficiency and volumetric efficiency. The wet ethanol can be set as five different fuel blends: hydrous ethanol fuel (E95W5) and mixtures of ethanol and water in the proportions of 90 % (E90W10), 80% (E80W20), 70 % (E70W30) and 60 % (E60W40) by volume of ethanol.
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Citation
Fagundez, J., Apio, A., and Salau, N., "ExpEngine: A Matlab® Add-On for the Simulation of the Combustion Cycle in a SI Engine Using Wet Ethanol," SAE Technical Paper 2015-36-0481, 2015, https://doi.org/10.4271/2015-36-0481.Also In
References
- Szklo , A. S. ; Shaeffer , R. ; Schuller , M. E. ; Chandler , W. Brazilian energy policies side-effects on CO2 emissions reduction Energy Policy 33 349 364 2005
- Ferguson , C. R. Internal Combustion Engines, Applied Thermosciences. John Wiley & Sons 1986
- Creating Graphical User Interfaces Matlab, The Language of Technical Computing The MathWorks, Inc. 2001
- Flowers , D. L. ; Aceves , S. M. ; Frias , J. M. Improving Ethanol Life Cycle Energy Efficiency by Direct Utilization of Wet Ethanol in HCCI Engines SAE Papers No. 2007-01-1867 2007
- Eichelberg , G. Some New Investigations on Old Combustion Engine Problems Engineering 148 1939 446 463
- Hohenberg , G. F. Advanced Approaches for Heat Transfer Calculations SAE Paper No. 790825 1979
- Sitkei , G. ; Ramanaiah , G.V. Rational Approach for Calculation of Heat Transfer in Diesel Engines SAE Paper No. 720027 1972
- Woschni , G. A Universally Applicable Equation for the instantaneous Heat Transfer Coefficient in the Internal Combustion Engine SAE Paper No. 670931 1967
- Fagundez , J. L. S. ; Lanzanova , T. D. M. ; Martins , M. E. S. ; Salau , N. P. G. Heat Transfer Evaluation of an Internal Combustion Engine - Part A SAE Papers No. 2014-36-0361 2014
- Fagundez , J. L. S. ; Lanzanova , T. D. M. ; Martins , M. E. S. ; Salau , N. P. G. Heat Transfer Evaluation of an Internal Combustion Engine - Part B SAE Papers No. 2014-36-0357 2014
- Heywood , J. B. Internal Combustion Engine Fundamentals McGraw-Hill 1988
- Dormand , J. R. ; Prince , P. J. A Family of Embedded Runge-Kutta Formulae Journal of Computational and Applied Mathematics 6 1980 19 26
- JANAF Thermochemical Tables 2d U.S. National Bureau of Standards Junho 1971
- Lounici , M. S. ; Loubar , K. ; Balistrou , M. ; Tazerout , M. Investigation on heat transfer evaluation for a more efficient two-zone combustion model in the case of natural gas SI engines Applied Thermal Engineering 2010 10.1016/j.applthermaleng.2010.09.012
- Kee , R. J. ; Rupley , J. A. ; Miller , J. A. ; Coltrin , M. E. et al. The Chemkin Thermodynamic Data Base Sandia Report, SAND87-8215B 1991
- Gordon , S. ; McBride , B. J. Computer Program for Calculation of Complex Chemical Equilibrium Composition, Rocket Performance, Incident and Reflected Shocks, and Chapman-Jouguet Detonations NASA SP-273 1971
- Annand , W.J.D. Heat Transfer in the Cylinder of Reciprocating Internal Combustion Engines. Proc. Instn Mech. Engrs. 177 1963 973 990