Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Study of Scale-Adaptive Simulation Model in Recirculating Flows.
Submission Author:
Luiz Otavio de Carvalho Bovolato , SP
Co-Authors:
Luiz Otavio de Carvalho Bovolato, Paulo Greco
Presenter: Luiz Otavio de Carvalho Bovolato
doi://10.26678/ABCM.COBEM2017.COB17-0430
Abstract
The project proposed aims to evaluate the capability of the Scale-Adaptive Simulation (SAS) model in order to predict mean flow characteristics and important turbulent structures of recirculating flows present in gas turbine combustors. In that case, two benchmark cases were selected, whose flow characteristics have similar behavior to some combustor flow portions: (i) Backward-Facing Step Flow; (ii) Flow through a swirler model. Comparisons were made between Reynolds Averaged Navier-Stokes (RANS), Large-Eddy Simulation (LES), SAS and empirical/numerical results. Numerical analyses were performed using the software Ansys CFX. As can be noted in the Backward-Facing Step case, the SAS model presents a good correlation with experimental results only inside the recirculation zone and, therefore, a better understanding of its numerical mechanisms is needed. For the swirler study case, SAS presents close results to experimental data for regions far from swirler outlet so that a longer simulation time is desirable.
Keywords
Scale-Adaptive Simulation, Large Eddy Simulation, Reynolds Averaged Navier-Stokes, Backward Facing Step, Recirculating Flow
