Cycle-resolved computation of compressible turbulence and premixed flame in an engine

Ken Naitoh, Yasuo Takagi, Kunio Kuwahara

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Cycle-resolved computations of the turbulent premixed flame in an internal combustion engine are performed for a wide range of operating conditions, such as engine speed and air-fuel ratio. For this purpose, first a multilevel mathematical formulation, which is suitable for both the large-eddy simulation and direct numerical simulation of the compressible turbulence and combusting flows in engines is derived, and then a suitable numerical algorithm is developed. With this method, the transition to turbulence near the end of the compression process and the supergrid fluctuations of the physical quantities can be calculated with less CPU time. For determining the subgrid turbulence and flame wrinkling, respectively, the Yakhot-Orszag turbulence model based on the renormalization group theory and a flame-sheet model are incorporated in the numerical code. Calculations are performed for a real engine with dual intake port and valves. The simulated results agree well with the experimental data for both turbulence intensity and pressure history. Cyclic variations of the flow field and flame propagation are also calculated.

Original languageEnglish
Pages (from-to)623-648
Number of pages26
JournalComputers and Fluids
Volume22
Issue number4-5
DOIs
Publication statusPublished - 1993
Externally publishedYes

    Fingerprint

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanical Engineering

Cite this