Link to project website: http://cfd.mace.manchester.ac.uk/twiki/bin/view/ATAAC/WebHome

EU 7th Framework Programme

Responsible for TU Berlin Contribution: Charles Mockett, Frank Thiele

Team members: Marian Fuchs, Christoph Gmelin, Björn Greschner, Thorsten Reimann, Liang Wang

The ATAAC project aims at improvements to CFD methods for aerodynamic flows used in today's aeronautical industry. The accuracy of these is limited by insufficient capabilities
of the turbulence modelling/simulation approaches available, especially at the high Reynolds numbers typical of real-life flows. As LES will not be affordable for such flows in the
next 4 decades, ATAAC focusses on Differential Reynolds Stress Models (DRSMs), advanced Unsteady RANS models, Scale-Adaptive Simulation (SAS), Wall Modelled LES and
different hybrid RANS-LES coupling schemes.

The resources of the project will be concentrated exclusively on flows for which the current models fail to provide sufficient accuracy, eg. in stalled flows, high-lift applications,
swirling flows (delta wings, trailing vortices), buffet etc. The assessment and improvement process will follow thoroughly conceived roadmaps linking practical goals with corresponding
industrial application challenges and with modelling/simulation issues through "stepping stones" represented by appropriate generic test cases.

Objectives

The final goals of ATAAC are:

To recommend one, or at most two, "best" DRSMs for conventional RANS and URANS

To provide a small set of hybrid RANS-LES and SAS methods that can be used as "reference" turbulence-resolving approaches in future CFD design tools.

To formulate clear indications of areas of applicability and uncertainty of these approaches for aerodynamic applications in industrial CFD

In contributing to reliable industrial CFD tools, ATAAC will have a direct impact on the predictive capabilities in design and optimisation, and directly contribute to the development of
greener aircraft.

TU Berlin work focus within ATAAC

TU Berlin are focussing on the further validation and improvement of state-of-the-art Detached-Eddy Simulation (DES) methods, in particular on their maturity for industrial application
and for computational aero-acoustics applications. TU Berlin is also responsible for the compilation of Best Practice Guidelines from the overall ATAAC project.

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