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A Study on EGR Utilization in Natural Gas SI Engines Using a Two-Zone Combustion Model
Technical Paper
2007-01-2041
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In this study, a computer model of the four-stroke, spark-ignition natural gas engine thermodynamic cycle was developed. This model was constructed based on the mass and energy conservation principles and the combustion process was analyzed using a two-zone combustion model. The combustion angle was calculated by using relationships derived from a turbulent model. In addition, a kinetic model based on the extended Zeldovich mechanism was developed in order to show the ability of Exhaust Gas Recirculation (EGR) on reducing NO emissions. Furthermore, a knocking model was incorporated with the two-zone combustion model in order to predict any auto-ignition that might occur. The aim of this study is to investigate the effect of adding EGR to a stoichiometric mixture on engine performance and NO emissions under several inlet conditions. It was found that using EGR in cooled supercharged inlet conditions (333 K and 250 kPa) can reduce both NO emission and fuel consumption by about 80%, and 19 to 27% (depending on engine speed) respectively compared to a stoichiometric non EGR mixture condition.
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Authors
- Amr Ibrahim - Sustainable Energy Centre, School of Advanced Manufacturing and Mechanical Engineering, University of South Australia
- Saiful Bari - Sustainable Energy Centre, School of Advanced Manufacturing and Mechanical Engineering, University of South Australia
- Frank Bruno - Sustainable Energy Centre, School of Advanced Manufacturing and Mechanical Engineering, University of South Australia
Topic
Citation
Ibrahim, A., Bari, S., and Bruno, F., "A Study on EGR Utilization in Natural Gas SI Engines Using a Two-Zone Combustion Model," SAE Technical Paper 2007-01-2041, 2007, https://doi.org/10.4271/2007-01-2041.Also In
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