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Comparison of kinetic mechanisms for numerical simulation of methanol combustion in dici heavy-duty engine

Pucilowski, Mateusz LU ; Li, Rui LU ; Xu, Shijie LU ; Li, Changle LU ; Qin, Fei; Tuner, Martin LU ; Bai, Xue Song LU and Konnov, Alexander A. LU (2019) SAE World Congress Experience, WCX 2019 In SAE Technical Papers 2019.
Abstract

The combustion process in a homogeneous charge compression ignition (HCCI) engine is mainly governed by ignition wave propagation. The in-cylinder pressure, heat release rate, and the emission characteristics are thus largely driven by the chemical kinetics of the fuel. As a result, CFD simulation of such combustion process is very sensitive to the employed reaction mechanism, which model the real chemical kinetics of the fuel. In order to perform engine simulation with a range of operating conditions and cylinder-piston geometry for the design and optimization purpose, it is essential to have a chemical kinetic mechanism that is both accurate and computational inexpensive. In this paper, we report on the evaluation of several chemical... (More)

The combustion process in a homogeneous charge compression ignition (HCCI) engine is mainly governed by ignition wave propagation. The in-cylinder pressure, heat release rate, and the emission characteristics are thus largely driven by the chemical kinetics of the fuel. As a result, CFD simulation of such combustion process is very sensitive to the employed reaction mechanism, which model the real chemical kinetics of the fuel. In order to perform engine simulation with a range of operating conditions and cylinder-piston geometry for the design and optimization purpose, it is essential to have a chemical kinetic mechanism that is both accurate and computational inexpensive. In this paper, we report on the evaluation of several chemical kinetic mechanisms for methanol combustion, including large mechanisms and skeletal/reduced mechanisms. These mechanisms are evaluated in terms of homogeneous ignition delay time, laminar flame speed, and multi-phase simulations of HCCI heavy-duty engine. The results are compared with experimental data and evaluated in terms of the accuracy and computational cost. It was found that scattering of ignition delay time predicted from different chemical kinetic mechanisms reported in the literature under homogeneous mixture ignition conditions give rise to a high sensitivity of the engine in-cylinder pressure prediction to the selected mechanism.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Technical Paper - WCX SAE World Congress Experience
series title
SAE Technical Papers
volume
2019
publisher
SAE International
conference name
SAE World Congress Experience, WCX 2019
conference location
Detroit, United States
conference dates
2019-04-09 - 2019-04-11
external identifiers
  • scopus:85064693839
ISSN
0148-7191
DOI
10.4271/2019-01-0208
language
English
LU publication?
yes
id
1606b28d-eb45-4b35-a24e-f348605f432f
date added to LUP
2019-05-03 12:31:40
date last changed
2019-05-28 03:57:29
@inproceedings{1606b28d-eb45-4b35-a24e-f348605f432f,
  abstract     = {<p>The combustion process in a homogeneous charge compression ignition (HCCI) engine is mainly governed by ignition wave propagation. The in-cylinder pressure, heat release rate, and the emission characteristics are thus largely driven by the chemical kinetics of the fuel. As a result, CFD simulation of such combustion process is very sensitive to the employed reaction mechanism, which model the real chemical kinetics of the fuel. In order to perform engine simulation with a range of operating conditions and cylinder-piston geometry for the design and optimization purpose, it is essential to have a chemical kinetic mechanism that is both accurate and computational inexpensive. In this paper, we report on the evaluation of several chemical kinetic mechanisms for methanol combustion, including large mechanisms and skeletal/reduced mechanisms. These mechanisms are evaluated in terms of homogeneous ignition delay time, laminar flame speed, and multi-phase simulations of HCCI heavy-duty engine. The results are compared with experimental data and evaluated in terms of the accuracy and computational cost. It was found that scattering of ignition delay time predicted from different chemical kinetic mechanisms reported in the literature under homogeneous mixture ignition conditions give rise to a high sensitivity of the engine in-cylinder pressure prediction to the selected mechanism.</p>},
  author       = {Pucilowski, Mateusz and Li, Rui and Xu, Shijie and Li, Changle and Qin, Fei and Tuner, Martin and Bai, Xue Song and Konnov, Alexander A.},
  booktitle    = {SAE Technical Papers},
  issn         = {0148-7191},
  language     = {eng},
  location     = {Detroit, United States},
  month        = {04},
  publisher    = {SAE International},
  title        = {Comparison of kinetic mechanisms for numerical simulation of methanol combustion in dici heavy-duty engine},
  url          = {http://dx.doi.org/10.4271/2019-01-0208},
  volume       = {2019},
  year         = {2019},
}