3D DNS analysis of interaction between turbulence and chemical reaction in an auto-ignition process under homogeneous n-heptane mixture

Atsushi Teraji, Hironari Ikuta, Takashi Miki, Takashi Ishihara

Research output: Contribution to journalArticle

Abstract

The role of turbulence in the combustion systems of flame propagation and diffusion combustion is to mix burned region with unburned region to promote combustion. Meanwhile homogeneous charged compression ignition (HCCI) is a combustion system which goes through the chemical reaction in overall field. It makes no rigid distinction between unburned region and burned region, and differs from the systems of flame propagation and diffusion combustion. Therefore, the role of turbulence in HCCI differs from other combustion systems. Three-dimensional direct numerical simulation (DNS) of auto-ignition process of n-heptane/air mixture was performed to analyze the interaction between chemical reaction and turbulence. In conclusions, the progress of chemical reaction delays under the area where rotation dominants in comparion with the area where distortion dominants under higher temperature region. Turbulence makes complicated structure of heat release which includes sheet and coherent structures.

Original languageEnglish
Pages (from-to)431-438
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume79
Issue number799
DOIs
Publication statusPublished - Jan 1 2013
Externally publishedYes

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Keywords

  • Chemical reaction
  • Diffusion
  • Direct numerical simulation
  • Ignition
  • Low temperature oxidation
  • Turbulence
  • Turbulent mixing

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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