Development and application of image based measurement techniques for aerodynamic investigations in wind tunnels

Kurzfassung

The experimental investigation of unsteady complex flow fields in wind tunnels requires advanced measurement techniques. This paper describes the development and state-of-the-art of the most important of such image based measurement techniques for measurement of planar flow velocity fields, planar pressure distribution, model location and deformation, and quantitative high speed visualization as carried out by DLR Göttingen. The applications range from low speed flows to transonic flows, from high lift configurations to propellers and rotors, from wake vortex investigations in catapult facilities and water towing tanks to investigations of vortex break down phenomena on delta wings.