Large eddy simulation of premixed-flame in engine based on the multi-level formulation and the renormalization group theory

Ken Naitoh, Teruyuki Itoh, Yasuo Takagi, Kunio Kuwahara

Research output: Contribution to journalConference article

18 Citations (Scopus)

Abstract

Large Eddy Simulation of the turbulent premixed-flame in engine is performed in a wide range of the operating conditions such as engine speed, air-fuel ratio, and ignition timing. Firstly, a mathematical formulation suitable for Large Eddy Simulation (LES) and Direct Numerical Simulation (DNS) of the compressible turbulence and combusting flows is derived, which is the Multi-Level formulation. And a numerical algorithm based on the formulation is developed in order to calculate precisely the supergrid fluctuations of the physical quantities. As the determinations of the subgrid-turbulence and flame wrinkling, the Yakhot-Orszag turbulence model based on the Renormalization Group theory(RNG theory) and a flame-sheet model are combined with the numerical code. Computations are performed for a real engine with dual intakeport and valves. Obtained computational data agrees well with the experimental data on turbulence-intensity and pressure history.

Original languageEnglish
JournalSAE Technical Papers
DOIs
Publication statusPublished - 1992 Jan 1
EventInternational Congress and Exposition - Detroit, MI, United States
Duration: 1992 Feb 241992 Feb 28

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ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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