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Numerical Performance Prediction using Experimental Combustion Model for Controlled-Auto-Ignition Natural Gas Engines
Technical Paper
2015-32-0847
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This study was undertaken to develop a method of numerical performance prediction for application to the development of controlled-auto-ignition (CAI) natural gas engines. By using a combustion model based on analyzed combustion data and introducing this to a commercial one-dimensional gas dynamic simulator, we attempted to establish a means of attaining a highly accurate performance prediction while reducing the calculation load. The combustion model was separately calibrated for two models, namely, the auto-ignition timing of the combustion and the mass fraction burned. As a result, the combustion modeling was able to successfully predict the accuracy of the auto-ignition timing difference at 0.03 degree of crank angle on average, and 0.95 degree in the 2σ region. Furthermore, the functions of the mass fraction burned were expressed using closely correlated in-cylinder parameters. To investigate the application of this numerical performance prediction method, a parametric study to maximize the thermal efficiency of CAI natural gas engines was conducted. Different engine configurations with stroke /bore ratios of 1.0 to 2.5 and intake/exhaust valve diameter ratios of 0.8 to 1.4 were examined, with the maximum net indicated thermal efficiency being 45% for a stroke/bore ratio of about 2.0.and an intake/exhaust valve diameter ratio of 1.0. Using this approach, it is possible to predict the performance by specifying the configuration, while reducing the calculation load involved in a parameter study of CAI engines with a wide range of specifications. Moreover, the measured data can be stored as combustion data for incorporation into the model used for simulation. Also, this simplified experiment-based combustion model could be implemented in the engine electric control unit to ensure the stable running of a CAI natural gas engine.
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Citation
Kiura, T. and Kogo, H., "Numerical Performance Prediction using Experimental Combustion Model for Controlled-Auto-Ignition Natural Gas Engines," SAE Technical Paper 2015-32-0847, 2015, https://doi.org/10.4271/2015-32-0847.Also In
References
- Koga , H. , and Watanabe , S. Research on Extended Expansion General-Purpose Engine - Heat Release and Friction - SAE Technical Paper 2007-32-0003 2007 10.4271/2007-32-0003
- Kono , S. , Koga , H. , and Watanabe , S. Research on Extended Expansion General-Purpose Engine-Efficiency Enhancement by Natural Gas Operation- SAE Technical Paper 2010-32-0007 2010 10.4271/2010-32-0007
- Koga , H. and Kiura , T. A Study of Controlled Auto-Ignition in Small Natural Gas Engines SAE Int. J.Engines 6 4 2013 2139 2013
- Takita , Y. , Kono , S. , and Naoi , A. Study of Methods to Enhance Energy Utilization Efficiency of Micro Combined Heat and Power Generation Unit Equipped with an Extended Expansion Linkage Engine and Reduction of Waste Energy SAE Technical Paper 2011-32-0574 2011 10.4271/2011-32-0574
- Ohnishi , S. et al. Active Thermo-atmosphere Combustion (ATAC) A New Combustion Process for Internal Combustion Engines SAE Technical Paper 790501 10.4271/790501
- Ishibashi , Y. and Asai , M. Improving the Exhaust Emissions of Two-Stroke Engines by Applying the Activated Radical Combustion SAE Technical Paper 960742 1996 10.4271/960742
- Coward , H. F. and Jones , G. W. Limits of Flammability of Gases and Vapors U.S. Department of the Interior, Bureau of Mines 1952
- Fiveland , S. , Agama , R. , Christensen , M. , Johansson , B. et al. Experimental and Simulated Results Detailing the Sensitivity of Natural Gas HCCI Engines to Fuel Composition SAE Technical Paper 2001-01-3609 2001 10.4271/2001-01-3609
- Tominaga , R. , Morimoto , S. , Kawabata , Y. , Matsuo , S. et al. Effects of Heterogeneous EGR on the Natural Gas Fueled HCCI Engine Using Experiments, CFD and Detailed Kinetics SAE Technical Paper 2004-01-0945 2004 10.4271/2004-01-0945
- Yap , D. , Megaritis , A. , Wyszynski , M. , and Xu , H. Residual Gas Trapping for Natural Gas HCCI SAE Technical Paper 2004-01-1973 2004 10.4271/2004-01-1973
- Jun , D. and Iida , N. A Study of High Combustion Efficiency and Low CO Emission in a Natural Gas HCCI Engine SAE Technical Paper 2004-01-1974 2004 10.4271/2004-01-1974
- Tamura , M. , and Hagi , S. An Investigation of A Natural-Gas-Fueled Homogeneous Charge Compression Ignition Engine for High-Performance Co-Generation Systems SAE Technical Paper 2005-32-0005 2005 10.4271/2005-32-0005
- Kawasaki , K. , Takegoshi , A. , Yamane , K. , Ohtsubo , H. et al. Combustion Improvement and Control for a Natural Gas HCCI Engine by the Internal EGR by Means of Intake-valve Pilot-opening SAE Technical Paper 2006-01-0208 2006 10.4271/2006-01-0208
- Ohtsubo , H. , Nakazono , T. , Shirouzu , T. , Yamane , K. et al. Application of a Multi-Cylinder Natural Gas PCCI Engine with Spark Ignition to Generator SAE Technical Paper 2008-01-0015 2008 10.4271/2008-01-0015
- Williams , S. , Hu , L. , Nakazono , T. , Ohtsubo , H. et al. Oxidation Catalysts for Natural Gas Engine Operating under HCCI or SI Conditions SAE Int. J. Fuels Lubr. 1 1 326 337 2009 10.4271/2008-01-0807
- Livengood J. C. and Wu , P. C. Correlation of Autoignition Phenomena in Internal Combustion Engines and Rapid Compression Machines 5th International Symposium on Combustion 347 1955
- Heywood , J. B. Internal Combustion Engine Fundamentals New York McGraw-Hill 1988
- Wiebe , I. I. Progress in engine cycle analysis: Combustion rate and cycle processes Mashgiz Ural-Siberia Branch 1962 271
- Wiebe , I. I. Semi-empirical expression for combustion rate in engines Proceedings of Conference on Piston engines USSR 1956 185 191
- http://www.ricardo.com/en-GB/What-we-do/Software/Products/WAVE/
- http://jp.mathworks.com/products/simulink/