Dynamic Measurements on the NASA CRM Model tested in ETW
The European Transonic Windtunnel (ETW) hosted a test campaign within the frame of the European infrastructure project ESWIRP (European Strategic Wind tunnels Improved Research Potential). The project was funded by the European Commission "to enhance the complementary research potential and service capabilities of 3 strategic wind tunnels in Europe both in terms of productivity and quality" and to enable a trans-national access to these dedicated facilities for research institutes and university. ETW as Europe’s unique testing facility for high Reynolds number testing is one of these strategic wind tunnel facilities in Europe, enabling tests under real flight Reynolds and Mach numbers at defined aeroelastic conditions. Within the ESWIRP project an international consortium was selected to prepare a test campaign to perform an unsteady wake analysis combined with wall interference investigations by demonstrating the capability to efficiently apply complex techniques under cryogenic conditions. In cooperation with NASA the NASA Common Research Model could be used as wind tunnel model, allowing to build up a public available database and giving the chance to compare results between wind tunnel facilities around the world. The present paper concentrates on the analysis of dynamic data acquired during the test campaign to assess the eigenmotion modes of the model. Therefore it describes the applied instrumentation system, the achieved results and the analysis to identify the eigenmotion modes.