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Large eddy simulation of a H-2/N-2 lifted flame in a vitiated co-flow

In English

Författare

  • Christophe Duwig
  • Laszlo Fuchs

Summary, in English

A lifted turbulent H-2/N-2 flame in a vitiated co-flow is studied using Large Eddy Simulation together with a closure based on perfectly stirred reactors. A part of the closure, chemical look-up tables, are generated to close the filtered temperature equations and to compute local radical concentrations throughout the computational domain. The approach has been used to simulate a lifted turbulent flame. The results have been found to be insensitive to the combustion model employed and to the grid resolution. However, the results are very sensitive to the temperature of the co-flow stream and this result is well in line with previous findings. The numerical predictions were further compared to detailed experimental data obtained by Cabra et al. (2002). The agreement between the two sets of data is very good, indicating that the present approach predicts successfully the combustion process including the OH mass fractions. Finally, the LES data were used to study the flame dynamics and stabilization mechanisms.

Avdelning/ar

Publiceringsår

2008

Språk

Engelska

Sidor

453-480

Publikation/Tidskrift/Serie

Combustion Science and Technology

Volym

180

Issue

3

Dokumenttyp

Artikel i tidskrift

Förlag

Taylor & Francis

Ämne

  • Fluid Mechanics and Acoustics

Nyckelord

  • turbulent combustion
  • decomposition
  • proper orthogonal
  • non-premixed flames
  • large eddy simulation
  • lift-off

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1563-521X