DNW Aero

CAE and DNW announce a workshop on CFD-wind tunnel correlation study during Zhuhai Air Show

12 Nov 2014

China, Zhuhai Air Show– On the 11sth of November, at AVIC Media Center, Hall-3, the Chinese Aeronautical Establishment (CAE) and German-Dutch Wind tunnels (DNW) will announce the organisation of the “1st CAE-DNW Workshop on CFD-Wind Tunnel Correlation Study”, to be held in 2015. Under the framework of CAE-DNW Cooperation Agreement, a CAE Aerodynamic Validation Model (CAE-AVM) was tested in DNW-HST high speed wind tunnel in the second half of 2013, following the signing ceremony of the contract at Paris Airshow 2013.

DNW, founded and jointly owned by DLR and NLR, is the operator of a globally renowned group of wind tunnels in Germany and the Netherlands with state-of-the-art measurement techniques. Most aircraft manufacturers trust their newest design to the professionals of DNW. DNW has been a reliable partner in many of civil aerospace programs.

The dual purpose model CAE-AVM is tested both for aerodynamic performance and CAE AVICFD code validation. Before and after the wind tunnel tests, CAE performed detailed CFD investigations. It is found that to effectively compare CFD and wind tunnel data, typical test related phenomena (e.g. sting interference, model deformation) would have to be taken into account.

For this specific CAE-AVM test, a 1:22 scale model was defined by CAE and manufactured by NLR. The geometry represented an airplane with slender swept wings and fuselage mounted engines. During the test a unique combination of measuring techniques (Stereo Pattern Recognition SPR, Infrared technique IRT) in parallel was used. Wing deformation, pressure distribution and transition line position were accurately determined.

The goal of this workshop will be to compare well established CFD codes of the participants and evaluate the results and outcomes. This will give parties a unique chance to use their own CFD code and procedures, to calculate the CAE-AVM model geometry with and without wing deformation and related HST tunnel equipment geometry, and evaluate the adequacy of their methods, meanwhile to provide their observations of CFD-wind tunnel correlation. During the workshop parties can present their results, and jointly compare with the wind tunnel test data.

The workshop is to be held in the second half of 2015. detailed information of the organization will be made available in the beginning of 2015 in the CAE and DNW websites.