Abstract
A two-dimensional direct numerical simulation (DNS) was applied to investigate the autoignition process of an n-heptane/air mixture. The diffusion of intermediate species was studied in terms of the influence on the ignition delay period and the chemical reaction process. A simplified reaction mechanism was used in this study. The influence of turbulence was investigated by comparing the results of a zero-dimensional simulation and two-dimensional direct simulation of a non-turbulence condition. It was found that the ignition delay period was strongly affected by the different diffusion rates of intermediate species. It was shown that the outflow of OH radicals having a larger diffusion coefficient reduces the reaction rate at the high temperature point. In contrast, the reaction rate was enhanced by the influx of OH radicals at the low temperature point.
| Original language | English |
|---|---|
| Pages | 152-157 |
| Number of pages | 6 |
| Publication status | Published - Dec 1 2012 |
| Externally published | Yes |
| Event | 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012 - Fukuoka, Japan Duration: Jul 23 2012 → Jul 26 2012 |
Other
| Other | 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012 |
|---|---|
| Country | Japan |
| City | Fukuoka |
| Period | 7/23/12 → 7/26/12 |
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Keywords
- Auto-ignition
- Chemical reaction
- Direct numerical simulation
- Turbulent mixing
ASJC Scopus subject areas
- Control and Systems Engineering
- Modelling and Simulation
Cite this
Numerical analysis of effect of intermediate species diffusion on low temperature oxidation process in a homogeneous n-heptane mixture. / Teraji, Atsushi; Ishihara, Takashi; Kaneda, Yukio.
2012. 152-157 Paper presented at 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012, Fukuoka, Japan.Research output: Contribution to conference › Paper
}
TY - CONF
T1 - Numerical analysis of effect of intermediate species diffusion on low temperature oxidation process in a homogeneous n-heptane mixture
AU - Teraji, Atsushi
AU - Ishihara, Takashi
AU - Kaneda, Yukio
PY - 2012/12/1
Y1 - 2012/12/1
N2 - A two-dimensional direct numerical simulation (DNS) was applied to investigate the autoignition process of an n-heptane/air mixture. The diffusion of intermediate species was studied in terms of the influence on the ignition delay period and the chemical reaction process. A simplified reaction mechanism was used in this study. The influence of turbulence was investigated by comparing the results of a zero-dimensional simulation and two-dimensional direct simulation of a non-turbulence condition. It was found that the ignition delay period was strongly affected by the different diffusion rates of intermediate species. It was shown that the outflow of OH radicals having a larger diffusion coefficient reduces the reaction rate at the high temperature point. In contrast, the reaction rate was enhanced by the influx of OH radicals at the low temperature point.
AB - A two-dimensional direct numerical simulation (DNS) was applied to investigate the autoignition process of an n-heptane/air mixture. The diffusion of intermediate species was studied in terms of the influence on the ignition delay period and the chemical reaction process. A simplified reaction mechanism was used in this study. The influence of turbulence was investigated by comparing the results of a zero-dimensional simulation and two-dimensional direct simulation of a non-turbulence condition. It was found that the ignition delay period was strongly affected by the different diffusion rates of intermediate species. It was shown that the outflow of OH radicals having a larger diffusion coefficient reduces the reaction rate at the high temperature point. In contrast, the reaction rate was enhanced by the influx of OH radicals at the low temperature point.
KW - Auto-ignition
KW - Chemical reaction
KW - Direct numerical simulation
KW - Turbulent mixing
UR - http://www.scopus.com/inward/record.url?scp=84877864479&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84877864479&partnerID=8YFLogxK
M3 - Paper
SP - 152
EP - 157
ER -