Modelling compression ignition engines by incorporation of the flamelet generated manifolds combustion closure

Amin Maghbouli (Corresponding author), Berşan Akkurt, Tommaso Lucchini, Gianluca D'Errico, Niels G. Deen, Bart Somers

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
38 Downloads (Pure)

Abstract

Tabulated chemistry models allow to include detailed chemistry effects at low cost in numerical simulations of reactive flows. Characteristics of the reactive fluid flows are described by a reduced set of parameters that are representative of the flame structure at small scales so-called flamelets. For a specific turbulent combustion configuration, flamelet combustion closure, with proper formulation of the flame structure can be applied. In this study, flamelet generated manifolds (FGM) combustion closure with progress variable approach were incorporated with OpenFOAM® source code to model combustion within compression ignition engines. For IC engine applications, multi-dimensional flamelet look-up tables for counter flow diffusive flame configuration were generated. Source terms of non-premixed combustion configuration in flamelet domain were tabulated based on pressure, temperature of unburned mixture, mixture fraction, and progress variable. A new frozen flamelet method was introduced to link one dimensional reaction diffusion space to multi-dimensional Computational Fluid Dynamics (CFD) physical space to fulfill correct modelling of thermal state of the engine at expansion stroke when charge composition was changed after combustion and reaction rates were subsided. Predictability of the developed numerical framework were evaluated for Sandia Spray A (constant volume vessel), Spray B (light duty optical Diesel engine), and a heavy duty Diesel engine experiments under Reynolds averaged Navier Stokes turbulence formulation. Results showed that application of multi-dimensional FGM combustion closure can comprehensively predict key parameters such as: ignition delay, in-cylinder pressure, apparent heat release rate, flame lift-off, and flame structure in Diesel engines.

Original languageEnglish
Pages (from-to)414-438
Number of pages25
JournalCombustion Theory and Modelling
Volume23
Issue number3
DOIs
Publication statusPublished - 4 May 2019

Keywords

  • diesel engines
  • flamelet generated manifolds
  • openFOAM
  • tabulated chemistry

Fingerprint Dive into the research topics of 'Modelling compression ignition engines by incorporation of the flamelet generated manifolds combustion closure'. Together they form a unique fingerprint.

  • Cite this