DETAILED CHEMICAL KINETIC MODELING OF ISO-OCTANE SI-HCCI TRANSITION
Abstract
The authors 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 (ST) combustion to homogeneous 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 they 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 scneario is consistent with that implemented in previously reported experimental measurements on an experimental engine equipped with variable valve actuation. They find that the model captures many of the important experimental trends, including stable SI combustion at low EGR ({approx} 0.10), a transition to highly unstable combustion at intermediate EGR, and finally stable HCCI combustion at very high EGR ({approx} 0.75). Remaining differences between the predicted and experimental instability patterns indicate that there is further room for model improvement.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 977228
- Report Number(s):
- LLNL-CONF-418042
Journal ID: ISSN 0148-7191; TRN: US201013%%442
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Conference
- Resource Relation:
- Journal Volume: 1; Conference: Presented at: Society of Automotive Engineers 2010 world conference, detroit, MI, United States, Apr 13 - Apr 15, 2010
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 29 ENERGY PLANNING, POLICY AND ECONOMY; COMBUSTION; COMPRESSION; ENERGY BALANCE; ENGINEERS; ENGINES; IGNITION; INSTABILITY; KINETICS; REACTION KINETICS; SIMULATION; VALVES; VELOCITY
Citation Formats
Havstad, M A, Aceves, S M, McNenly, M J, Piggott, W T, Edwards, K D, Wagner, R M, Daw, C S, and Finney, C A. DETAILED CHEMICAL KINETIC MODELING OF ISO-OCTANE SI-HCCI TRANSITION. United States: N. p., 2009.
Web. doi:10.4271/2010-01-1087.
Havstad, M A, Aceves, S M, McNenly, M J, Piggott, W T, Edwards, K D, Wagner, R M, Daw, C S, & Finney, C A. DETAILED CHEMICAL KINETIC MODELING OF ISO-OCTANE SI-HCCI TRANSITION. United States. https://doi.org/10.4271/2010-01-1087
Havstad, M A, Aceves, S M, McNenly, M J, Piggott, W T, Edwards, K D, Wagner, R M, Daw, C S, and Finney, C A. 2009.
"DETAILED CHEMICAL KINETIC MODELING OF ISO-OCTANE SI-HCCI TRANSITION". United States. https://doi.org/10.4271/2010-01-1087. https://www.osti.gov/servlets/purl/977228.
@article{osti_977228,
title = {DETAILED CHEMICAL KINETIC MODELING OF ISO-OCTANE SI-HCCI TRANSITION},
author = {Havstad, M A and Aceves, S M and McNenly, M J and Piggott, W T and Edwards, K D and Wagner, R M and Daw, C S and Finney, C A},
abstractNote = {The authors 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 (ST) combustion to homogeneous 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 they 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 scneario is consistent with that implemented in previously reported experimental measurements on an experimental engine equipped with variable valve actuation. They find that the model captures many of the important experimental trends, including stable SI combustion at low EGR ({approx} 0.10), a transition to highly unstable combustion at intermediate EGR, and finally stable HCCI combustion at very high EGR ({approx} 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/977228},
journal = {},
issn = {0148-7191},
number = ,
volume = 1,
place = {United States},
year = {Mon Oct 12 00:00:00 EDT 2009},
month = {Mon Oct 12 00:00:00 EDT 2009}
}