The Department of Experimental Methods develops optical and acoustical field measurement techniques for the acquisition of fluid-mechanical and aero-acoustical quantities and applies them mainly in large industrial wind tunnels and at in-flight testing for aerodynamics.
Quantitatively measurable values are pressure (PSP), velocity (PIV), location of transition lines (TSP), density (BOS), and sound pressure (Acoustic Microphone Array), in parallel with the determination of deformation (IPCT, PROPAC) and position of the model in the wind tunnel or of the wing of an aircraft or of a propeller. Application is mainly performed in the scope of large industrial projects in European co-operation. For this purpose mobile measurement systems have been developed by the department, which can be flexibly adjusted to particular testing environments. The quality of the results obtained in the rough environment of industrial test facilities is comparable with the results attained in the laboratory of universities.
All data is acquired with high spatial and temporal resolution non-intrusively so that no interference of the flow field by the measurement is to occur. In consequence, the methods developed are particularly suited for the aero-dynamical and aero-acoustical analysis of complex, unsteady three-dimensional flow fields. The acquired data sets constitute a reliable basis for the validation of numerical codes.
Increasingly, these image based measurement techniques are applied in parallel to obtain a more complete description of the flow field by determining several physical quantities simultaneously.
Hard- and software products
Conferences and courses