Convegni ATI - Accesso riservato soci CTI

Data: 04-2009

Autore: E. Giacomazzi, F. R. Picchia, N. Arcidiacono, D. Cecere, F. Donato

Collana: BT - 44 - Apr 09 - Processi di combustione: Tecnologie innovative per la compatibilità ambientale

Note:
Computational Fluid Dynamics (CFD) is increasing its importance in the design of systems involving reacting turbulent flows like industrial combustion devices. The associated complex physics demands for accurate models and advanced numerical methods. Nowadays supercomputing makes feasible using powerful CFD approaches like LES (Large Eddy Simulations), which is able to meet such demands. The aim of this work is to show some results related to flame anchoring obtained by means of the ENEA HeaRT code. HeaRT (Heat Release and Turbulence) is a fully compressible, reactive, unsteady flow solver that implements an original LES subgrid scale model, named Fractal Model. In particular, the flame analyzed is the Sandia/ETH-Zurich CO/H2/N2 non-premixed uncon•ned turbulent jet •ame. This flame is simulated in a three-dimensional axisymmetric formulation. The most important scientific issue related to this flame is its anchoring since although the the very tight thickness of the injector, it anchors the flame. Hence, the controlling physical mechanisms are analyzed in detail. Besides this, comparison with experimental data is also provided.