Detailed Chemical Kinetic Modeling of Iso-octane SI-HCCI Transition
Abstract
We describe a CHEMKIN-based multi-zone model that simulates the expected combustion variations in a single-cylinder engine fueled with iso-octane as the engine transitions from spark-ignited (SI) combustion to homogenous charge compression ignition (HCCI) combustion. The model includes a 63-species reaction mechanism and mass and energy balances for the cylinder and the exhaust flow. For this study we assumed that the SI-to-HCCI transition is implemented by means of increasing the internal exhaust gas recirculation (EGR) at constant engine speed. This transition scenario is consistent with that implemented in previously reported experimental measurements on an experimental engine equipped with variable valve actuation. We find that the model captures many of the important experimental trends, including stable SI combustion at low EGR (-0.10), a transition to highly unstable combustion at intermediate EGR, and finally stable HCCI combustion at very high EGR (-0.75). Remaining differences between the predicted and experimental instability patterns indicate that there is further room for model improvement.
- Authors:
-
- Lawrence Livermore National Laboratory (LLNL)
- ORNL
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Transportation Research Center (NTRC)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 979615
- DOE Contract Number:
- DE-AC05-00OR22725
- Resource Type:
- Conference
- Resource Relation:
- Conference: SAE 2010 World Congress, Detroit, MI, USA, 20100413, 20100415
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 33 ADVANCED PROPULSION SYSTEMS; 02 PETROLEUM; SPARK IGNITION ENGINES; COMBUSTION KINETICS; ALKANES; COMPUTERIZED SIMULATION; MASS BALANCE; ENERGY BALANCE; EXHAUST GASES; RECYCLING; HCCI; combustion; kinetics
Citation Formats
Havstad, Mark A, Aceves, Salvador M, McNenly, Matthew J, Piggott, William T, Edwards, Kevin Dean, Wagner, Robert M, Daw, C Stuart, and FINNEY, Charles E A. Detailed Chemical Kinetic Modeling of Iso-octane SI-HCCI Transition. United States: N. p., 2010.
Web. doi:10.4271/2010-01-1087.
Havstad, Mark A, Aceves, Salvador M, McNenly, Matthew J, Piggott, William T, Edwards, Kevin Dean, Wagner, Robert M, Daw, C Stuart, & FINNEY, Charles E A. Detailed Chemical Kinetic Modeling of Iso-octane SI-HCCI Transition. United States. https://doi.org/10.4271/2010-01-1087
Havstad, Mark A, Aceves, Salvador M, McNenly, Matthew J, Piggott, William T, Edwards, Kevin Dean, Wagner, Robert M, Daw, C Stuart, and FINNEY, Charles E A. 2010.
"Detailed Chemical Kinetic Modeling of Iso-octane SI-HCCI Transition". United States. https://doi.org/10.4271/2010-01-1087.
@article{osti_979615,
title = {Detailed Chemical Kinetic Modeling of Iso-octane SI-HCCI Transition},
author = {Havstad, Mark A and Aceves, Salvador M and McNenly, Matthew J and Piggott, William T and Edwards, Kevin Dean and Wagner, Robert M and Daw, C Stuart and FINNEY, Charles E A},
abstractNote = {We describe a CHEMKIN-based multi-zone model that simulates the expected combustion variations in a single-cylinder engine fueled with iso-octane as the engine transitions from spark-ignited (SI) combustion to homogenous charge compression ignition (HCCI) combustion. The model includes a 63-species reaction mechanism and mass and energy balances for the cylinder and the exhaust flow. For this study we assumed that the SI-to-HCCI transition is implemented by means of increasing the internal exhaust gas recirculation (EGR) at constant engine speed. This transition scenario is consistent with that implemented in previously reported experimental measurements on an experimental engine equipped with variable valve actuation. We find that the model captures many of the important experimental trends, including stable SI combustion at low EGR (-0.10), a transition to highly unstable combustion at intermediate EGR, and finally stable HCCI combustion at very high EGR (-0.75). Remaining differences between the predicted and experimental instability patterns indicate that there is further room for model improvement.},
doi = {10.4271/2010-01-1087},
url = {https://www.osti.gov/biblio/979615},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}