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Comparison of automatic reduction procedures for ignition chemistry

Lövås, Terese LU ; Amnéus, Per LU ; Mauss, Fabian LU and Mastorakos, E (2002) Twenty-Ninth International Symposium on Combustion Hokkaido University Sapporo Japan In Proceedings of the Combustion Institute 29. p.1387-1393
Abstract
In this paper, we present a comparison between the reduced mechanisms obtained through a computational singular perturbation method (CSP) and the reduced mechanisms obtained through a lifetime analysis based only on the diagonal elements of the Jacobian matrix and a species sensitivity The two methods are used for the analysis of autoignition, which is an interesting test situation because of the sensitivity of ignition to the radical pool and the smaller range of timescales expected. It is found that the steady-state species selected by the two methods are in good agreement. The mechanisms are reduced to a 10-step mechanism when CSP is applied and an 11-step mechanism in the case of the simpler lifetime analysis. Both mechanisms are... (More)
In this paper, we present a comparison between the reduced mechanisms obtained through a computational singular perturbation method (CSP) and the reduced mechanisms obtained through a lifetime analysis based only on the diagonal elements of the Jacobian matrix and a species sensitivity The two methods are used for the analysis of autoignition, which is an interesting test situation because of the sensitivity of ignition to the radical pool and the smaller range of timescales expected. It is found that the steady-state species selected by the two methods are in good agreement. The mechanisms are reduced to a 10-step mechanism when CSP is applied and an 11-step mechanism in the case of the simpler lifetime analysis. Both mechanisms are compared with the detailed mechanism and experimental data and are found to reproduce the physical and chemical parameters very well. This shows that for a large part of the timescale range, the system is close to linear. The comparison shows the advantage of the CSP method as being somewhat more accurate. However, the simpler lifetime analysis is of sufficient accuracy and of more convenience when applied to a system requiring a considerable reduction in computational time, as is the case when applying online reduction. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Ignition chemistry
in
Proceedings of the Combustion Institute
volume
29
pages
1387 - 1393
publisher
Elsevier
conference name
Twenty-Ninth International Symposium on Combustion Hokkaido University Sapporo Japan
external identifiers
  • wos:000182866100166
  • scopus:9944252434
ISSN
0082-0784
DOI
10.1016/S1540-7489(02)80170-5
language
English
LU publication?
yes
id
08359581-db34-4ae3-a41b-ab95d9c991e0 (old id 310796)
date added to LUP
2007-11-28 10:47:07
date last changed
2017-06-18 04:27:59
@inproceedings{08359581-db34-4ae3-a41b-ab95d9c991e0,
  abstract     = {In this paper, we present a comparison between the reduced mechanisms obtained through a computational singular perturbation method (CSP) and the reduced mechanisms obtained through a lifetime analysis based only on the diagonal elements of the Jacobian matrix and a species sensitivity The two methods are used for the analysis of autoignition, which is an interesting test situation because of the sensitivity of ignition to the radical pool and the smaller range of timescales expected. It is found that the steady-state species selected by the two methods are in good agreement. The mechanisms are reduced to a 10-step mechanism when CSP is applied and an 11-step mechanism in the case of the simpler lifetime analysis. Both mechanisms are compared with the detailed mechanism and experimental data and are found to reproduce the physical and chemical parameters very well. This shows that for a large part of the timescale range, the system is close to linear. The comparison shows the advantage of the CSP method as being somewhat more accurate. However, the simpler lifetime analysis is of sufficient accuracy and of more convenience when applied to a system requiring a considerable reduction in computational time, as is the case when applying online reduction.},
  author       = {Lövås, Terese and Amnéus, Per and Mauss, Fabian and Mastorakos, E},
  booktitle    = {Proceedings of the Combustion Institute},
  issn         = {0082-0784},
  keyword      = {Ignition chemistry},
  language     = {eng},
  pages        = {1387--1393},
  publisher    = {Elsevier},
  title        = {Comparison of automatic reduction procedures for ignition chemistry},
  url          = {http://dx.doi.org/10.1016/S1540-7489(02)80170-5},
  volume       = {29},
  year         = {2002},
}