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LES OF TURBULENT PREMIXED FLAME USING REDIM TECHNIQUE AND PRESUMED FILTERED DENSITY FUNCTIONS

Natalya A. Platova
Institute of Fluid Mechanics Technical University of Dresden George-Bahr-Strasse 3c, 01062 Dresden, Germany

Ping Wang
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Jochen Frohlich
Institute for Technical Chemistry und Polymer Chemistry University of Karlsruhe; Institute of Fluid Mechanics, Dresden University of Technology, George-Bähr-Str. 3c, D-01062, Germany

Ulrich Maas
Institute for Technical Thermodynamics, Karlsruhe University (TH), Kaiserstraβe 12, 76131 Karlsruhe, Germany

Sinopsis

For the first time the Reaction-Diffusion Manifold (REDIM) technique is implemented together with a Presumed Filtered Density Function (FDF) to carry out Large Eddy Simulation of lean premixed swirling flames. The REDIM approach reduces detailed chemical kinetics to low-dimensional reaction-diffusion manifolds in composition space, so that many species can be accurately estimated at a relatively low computational cost via a look-up table. In the present work, only one reduced coordinate, the CO2 mass fraction, is considered in the REDIM look-up table. Implementation of the REDIM/FDF model is performed with two presumed FDF shapes, Top Hat and Clipped Gaussian. Two flames are simulated, with equivalence ratios 0.75 and 0.83, respectively. Velocity, temperature and major species concentration profiles are discussed and compared to the experimental data. The results are in good overall agreement with the experiment.