Thermodynamic efficiency assessment of gasoline spark ignition and compression ignition operating strategies using a new multi-mode combustion model for engine system simulations
Abstract
Advanced combustion strategies for gasoline engines employing highly dilute and low-temperature combustion modes, such as homogeneous charge compression ignition and spark-assisted compression ignition, promise significant improvements in efficiency and emissions. This article presents a novel, reduced-order, physics-based model to capture advanced multi-mode combustion involving spark ignition, homogeneous charge compression ignition and spark-assisted compression ignition operating strategies. The purpose of such a model, which until now was unavailable, was to enhance existing capabilities of engine system simulations and facilitate large-scale parametric studies related to these advanced combustion modes. The model assumes two distinct thermodynamic zones divided by an infinitely thin flame interface, where turbulent flame propagation is captured using a new zero-dimensional formulation of the coherent flame model, and end-gas auto-ignition is simulated using a hybrid approach employing chemical kinetics and a semi-empirical burn rate model. The integrated model was calibrated using three distinct experimental data sets for spark ignition, homogeneous charge compression ignition and spark-assisted compression ignition combustion. The results demonstrated overall good trend-wise agreement with the experimental data, including the ability to replicate heat release characteristics related to flame propagation and auto-ignition during spark-assisted compression ignition combustion. The calibrated model was assessed using a large parametric study, where themore »
- Authors:
-
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA, Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Mechanical Engineering, Stony Brook University, Stony Brook, NY, USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1494645
- Grant/Contract Number:
- EE0000203
- Resource Type:
- Journal Article: Published Article
- Journal Name:
- International Journal of Engine Research
- Additional Journal Information:
- Journal Name: International Journal of Engine Research Journal Volume: 20 Journal Issue: 3; Journal ID: ISSN 1468-0874
- Publisher:
- SAGE Publications
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Ortiz-Soto, Elliott A., Lavoie, George A., Wooldridge, Margaret S., and Assanis, Dennis N. Thermodynamic efficiency assessment of gasoline spark ignition and compression ignition operating strategies using a new multi-mode combustion model for engine system simulations. United Kingdom: N. p., 2018.
Web. doi:10.1177/1468087417752195.
Ortiz-Soto, Elliott A., Lavoie, George A., Wooldridge, Margaret S., & Assanis, Dennis N. Thermodynamic efficiency assessment of gasoline spark ignition and compression ignition operating strategies using a new multi-mode combustion model for engine system simulations. United Kingdom. https://doi.org/10.1177/1468087417752195
Ortiz-Soto, Elliott A., Lavoie, George A., Wooldridge, Margaret S., and Assanis, Dennis N. 2018.
"Thermodynamic efficiency assessment of gasoline spark ignition and compression ignition operating strategies using a new multi-mode combustion model for engine system simulations". United Kingdom. https://doi.org/10.1177/1468087417752195.
@article{osti_1494645,
title = {Thermodynamic efficiency assessment of gasoline spark ignition and compression ignition operating strategies using a new multi-mode combustion model for engine system simulations},
author = {Ortiz-Soto, Elliott A. and Lavoie, George A. and Wooldridge, Margaret S. and Assanis, Dennis N.},
abstractNote = {Advanced combustion strategies for gasoline engines employing highly dilute and low-temperature combustion modes, such as homogeneous charge compression ignition and spark-assisted compression ignition, promise significant improvements in efficiency and emissions. This article presents a novel, reduced-order, physics-based model to capture advanced multi-mode combustion involving spark ignition, homogeneous charge compression ignition and spark-assisted compression ignition operating strategies. The purpose of such a model, which until now was unavailable, was to enhance existing capabilities of engine system simulations and facilitate large-scale parametric studies related to these advanced combustion modes. The model assumes two distinct thermodynamic zones divided by an infinitely thin flame interface, where turbulent flame propagation is captured using a new zero-dimensional formulation of the coherent flame model, and end-gas auto-ignition is simulated using a hybrid approach employing chemical kinetics and a semi-empirical burn rate model. The integrated model was calibrated using three distinct experimental data sets for spark ignition, homogeneous charge compression ignition and spark-assisted compression ignition combustion. The results demonstrated overall good trend-wise agreement with the experimental data, including the ability to replicate heat release characteristics related to flame propagation and auto-ignition during spark-assisted compression ignition combustion. The calibrated model was assessed using a large parametric study, where the predicted homogeneous charge compression ignition and spark-assisted compression ignition operating regions at naturally aspirated conditions were representative of those determined during engine testing. Practical advanced combustion strategies were assessed relative to idealized engine simulations, which showed that efficiency improvements up to 30% compared with conventional spark-ignition operation are possible. The study revealed that poor combustion efficiency and pumping work are the primary mechanisms for efficiency losses for the advanced combustion strategies evaluated.},
doi = {10.1177/1468087417752195},
url = {https://www.osti.gov/biblio/1494645},
journal = {International Journal of Engine Research},
issn = {1468-0874},
number = 3,
volume = 20,
place = {United Kingdom},
year = {Tue Jan 23 00:00:00 EST 2018},
month = {Tue Jan 23 00:00:00 EST 2018}
}
Web of Science
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