Flow, Turbulence and Combustion

, Volume 86, Issue 3–4, pp 667–688 | Cite as

A Non-Adiabatic Flamelet Progress–Variable Approach for LES of Turbulent Premixed Flames

  • Donato Cecere
  • Eugenio Giacomazzi
  • Franca R. Picchia
  • Nunzio Arcidiacono
  • Filippo Donato
  • Roberto Verzicco
Article

Abstract

A progress variable/flame surface density/probability density function method has been employed for a Large Eddy Simulation of a CH4/Air turbulent premixed bluff body flame. In particular, both mean and variance of the progress variable are transported and subgrid spatially filtered gradient contributes to model the flame surface density (that introduces the effect of the subgrid flame reaction zone) and to presume a probability density function (that introduces the effect of subgrid fluctuations on chemistry). Chemistry is preliminarly tabulated in terms of laminar premixed flames and enthalpy is included as a new coordinate in their tabulation to take into account heat losses in the flowfield. Then, the PDF is used to build a turbulent flamelet library. The filtered mass, momentum, enthalpy and scalar equations mentioned above are integrated by an explicit scheme using finite differences, 2nd–order accurate in space and third order in time, over a cylindrical non-uniform grid using a staggered mesh. The bluff-body geometry is modelled by using the Immersed Boundary Method. The numerical predictions are compared with the available experimental data.

Keywords

Premixed turbulent flame Large Eddy Simulation Progress variable Flame surface density Probability density function Immersed Boundary Method 

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Donato Cecere
    • 1
  • Eugenio Giacomazzi
    • 1
  • Franca R. Picchia
    • 1
  • Nunzio Arcidiacono
    • 1
  • Filippo Donato
    • 2
  • Roberto Verzicco
    • 3
  1. 1.Sustainable Combustion Processes Laboratory, S.P.081ENEARomeItaly
  2. 2.Department of Electrical EngineeringUniversity “Sapienza”RomeItaly
  3. 3.Department of Mechanical EngineeringUniversity “Tor Vergata”RomeItaly

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