Development and Application of Advanced Experimental Methods for Multidisciplinary Problems

Abstract

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 distributions, density fields, model location and deformation, and quantitative high speed visualization techniques as canied 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 tank to investigations of vortex break down phenomena on delta wings. By providing planar information about complex flow fields these modern experimental techniques can considerably contribute to the validation of numerical methods to be applied to multidisciplinary problems.