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HYBRID V2F RANS/LES MODEL AND SYNTHETIC INLET TURBULENCE APPLIED TO A TRAILING EDGE FLOW

Juan Uribe
School of MACE, The University of Manchester, UK; EDF Energy R&D UK Centre, Low Carbon Generation, M13 9PL Manchester, United Kingdom

Nicolas Jarrin
The University of Manchester, CFD Group, School ofMech, Aero And Civil Eng, G Begg bld, Sackville St, Manchester M60 1QD, UK

Robert Prosser
The University of Manchester, CFD Group, School of Mech, Aero And Civil Eng, G Begg bld, Sackville St, Manchester M60 1QD, UK

Dominique R. Laurence
Modelling and Simulation Centre, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, UK; EDF R&D, Fluid mechanics, Energy and Environment, 78401 Chatou, France

Abstrakt

The flow over a trailing edge is computed using two different techniques to reduce the computational costs of LES. A hybrid method designed to split the contributions of the averaged and fluctuating velocity fields is used in order to relax the near-wall mesh requirements. A synthetic method for turbulence generation is used at the inlet in order to avoid a costly precursor simulation. The methodology has been first tested on channel flows at high Reynolds numbers on coarse meshes. The results at different Reynolds numbers up to Reτ are presented. They agree well with DNS data available in terms of mean velocities and stresses. The results for the trailing-edge flow are compared with the full LES with inlet boundary conditions from a precursor boundary layer simulation. Two cases are presented, one with a precursor simulation and one with the synthetic eddy method. The predictions of mean velocities and turbulent content agree well with the reference LES simulation.