TITLE

A DRD finite element formulation for computing turbulent reacting flows in gas turbine combustors

AUTHOR(S)
Corsini, A.; Iossa, C.; Rispoli, F.; Tezduyar, T. E.
PUB. DATE
June 2010
SOURCE
Computational Mechanics;Jun2010, Vol. 46 Issue 1, p159
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An effective multiscale treatment of turbulent reacting flows is presented with the use of a stabilized finite element formulation. The method proposed is developed based on the streamline-upwind/Petrov–Galerkin (SUPG) formulation, and includes discontinuity capturing in the form of a new generation “DRD” method, namely the “DRDJ” technique. The stabilized formulation is applied to finite-rate chemistry modelling based on mixture-fraction approaches with the so-called presumed-PDF technique. The turbulent combustion process is simulated for an aero-engine combustor configuration of RQL concept in non-premixed flame regime. The comparative analysis of the temperature and velocity fields demonstrate that the proposed SUPG+DRDJ formulation outperforms the stand-alone SUPG method. The improved accuracy is demonstrated in terms of the combustor overall performance, and the mechanisms involved in the distribution of the numerical diffusivity are also discussed.
ACCESSION #
49782289

 

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