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Development and Validation of a Quasi-Dimensional Model for HCCI Engine Performance and Emissions Studies Under Turbocharged Conditions
Technical Paper
2002-01-1757
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A PC-based, computationally-efficient, quasi-dimensional simulation of HCCI engine performance and emissions has been developed with the intent to bridge the gap between zero-dimensional and sequential fluid-mechanic - thermo-kinetic models. The model couples a detailed chemistry description, a core gas model, a predictive boundary layer model, and a ring-dynamics crevice flow model. The thermal boundary layer, which is axially discretized to account for the relative piston motion, is modeled using compressible energy arguments. The ring-pack crevice zone is modeled using a coupled ring dynamic and flow model. The physically-based mathematical model is solved within the context of a single simulation framework, which lends to flexibility and expediency in performing a range of parametric studies. The simulation was validated under turbo-charged conditions using data obtained from a Caterpillar 3500 test engine. Predictions of engine combustion and performance were found to be in very satisfactory agreement with experimental data. It was also shown that the simulation can predict emissions of unburned hydrocarbons (UHC) within 10-20% and carbon monoxides (CO) within 50% over a range of turbocharged engine conditions.
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Citation
Fiveland, S. and Assanis, D., "Development and Validation of a Quasi-Dimensional Model for HCCI Engine Performance and Emissions Studies Under Turbocharged Conditions," SAE Technical Paper 2002-01-1757, 2002, https://doi.org/10.4271/2002-01-1757.Also In
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