Numerical analysis of effect of intermediate species diffusion on low temperature oxidation process in a homogeneous n-heptane mixture

Atsushi Teraji, Takashi Ishihara, Yukio Kaneda

Research output: Contribution to conferencePaper

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 languageEnglish
Pages152-157
Number of pages6
Publication statusPublished - Dec 1 2012
Externally publishedYes
Event8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012 - Fukuoka, Japan
Duration: Jul 23 2012Jul 26 2012

Other

Other8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012
CountryJapan
CityFukuoka
Period7/23/127/26/12

Fingerprint

Ignition
Heptane
Reaction Rate
Oxidation
Numerical analysis
Numerical Analysis
Reaction rates
Reaction Mechanism
Zero-dimensional
Chemical Reaction
Diffusion Coefficient
Turbulence
Simulation
Direct numerical simulation
Temperature
Chemical reactions
Air
Influence
Direct numerical Simulation

Keywords

  • Auto-ignition
  • Chemical reaction
  • Direct numerical simulation
  • Turbulent mixing

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Modelling and Simulation

Cite this

Teraji, A., Ishihara, T., & Kaneda, Y. (2012). Numerical analysis of effect of intermediate species diffusion on low temperature oxidation process in a homogeneous n-heptane mixture. 152-157. Paper presented at 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012, Fukuoka, Japan.

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 conferencePaper

Teraji, A, Ishihara, T & Kaneda, Y 2012, 'Numerical analysis of effect of intermediate species diffusion on low temperature oxidation process in a homogeneous n-heptane mixture' Paper presented at 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012, Fukuoka, Japan, 7/23/12 - 7/26/12, pp. 152-157.
Teraji A, Ishihara T, Kaneda Y. Numerical analysis of effect of intermediate species diffusion on low temperature oxidation process in a homogeneous n-heptane mixture. 2012. Paper presented at 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012, Fukuoka, Japan.
Teraji, Atsushi ; Ishihara, Takashi ; Kaneda, Yukio. / Numerical analysis of effect of intermediate species diffusion on low temperature oxidation process in a homogeneous n-heptane mixture. Paper presented at 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012, Fukuoka, Japan.6 p.
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