Comparison of automatic reduction procedures for ignition chemistry
(2002) Twenty-Ninth International Symposium on Combustion Hokkaido University Sapporo Japan 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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/310796
- author
- Lövås, Terese LU ; Amnéus, Per LU ; Mauss, Fabian LU and Mastorakos, E
- organization
- publishing date
- 2002
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Ignition chemistry
- host publication
- Proceedings of the Combustion Institute
- volume
- 29
- pages
- 1387 - 1393
- publisher
- Elsevier
- conference name
- Twenty-Ninth International Symposium on Combustion Hokkaido University Sapporo Japan
- conference location
- Sapporo, Japan
- conference dates
- 2002-07-21 - 2002-07-25
- 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
- 2016-04-01 16:12:11
- date last changed
- 2022-01-28 18:01:20
@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}},
keywords = {{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}},
doi = {{10.1016/S1540-7489(02)80170-5}},
volume = {{29}},
year = {{2002}},
}