Numerical Characterization of the Reacting Flow in a Swirled Gasturbine Model Combustor

In this work the three-dimensional reacting turbulent flow field of a swirl-stabilized gas turbine model combustor was analysed with compressible CFD. For flow analysis the Scale Adaptive Simulation (SAS) turbulence model in combination with the Eddy Dissipation/Finite Rate Chemistry combustion model (EDM/FRC) was applied. The simulations were performed using the commercial CFD software package ANSYS CFX-11.0. Both the numerically achieved time-averaged values of the velocity components and their appropriate turbulent fluctuations (RMS) show a good agreement with the experimental values obtained by Laser Doppler Anemometry (LDA). The same excellent results were found for other flow quantities such as the temperature which was compared to Raman measurements that are obtained for the time-averaged temperature distributions as well as for the appropriate temperature fluctuations. Furthermore, experiments and simulations reveal a precessing vortex core (PVC) with a frequency of 1594Hz at the entry of the combustion chamber. The simulations have been performed on the HP XC4000 system of the High Performance Computing Centre Karlsruhe.

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