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A Combustion Regime-Based Model for Large Eddy Simulation

Author

Listed:
  • Eugenio Giacomazzi

    (Laboratory of Processes and Systems Engineering for Energy Decarbonisation, ENEA, 00124 Rome, Italy)

  • Donato Cecere

    (Laboratory of Processes and Systems Engineering for Energy Decarbonisation, ENEA, 00124 Rome, Italy)

Abstract

The aim of this work is to propose a unified (generalized) closure of the chemical source term in the context of Large Eddy Simulation able to cover all the regimes of turbulent premixed combustion. Turbulence/combustion scale interaction is firstly analyzed: a new perspective to look at commonly accepted combustion diagrams is provided based on the evidence that actual turbulent flames can experience locally several combustion regimes although global non-dimensional numbers would locate such flames in a single specific operating point of the standard combustion diagram. The deliverable is a LES subgrid scale model for turbulent premixed flames named Localized Turbulent Scales Model (LTSM). This is founded on the estimation of the local reacting volume fraction of a computational cell that is related to the local turbulent and laminar flame speeds and to the local flame thickness.

Suggested Citation

  • Eugenio Giacomazzi & Donato Cecere, 2021. "A Combustion Regime-Based Model for Large Eddy Simulation," Energies, MDPI, vol. 14(16), pages 1-23, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:16:p:4934-:d:613035
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