The goal of this project is the development and use of imaging measurement methods for the combined and parallel application in industrial wind tunnels, test rigs and flight tests. These can applied for the measurement of several relevant variables in fluid mechanics and unsteady flows and in the investigation of the aerodynamics of high Reynolds numbers. This field data is supposed to be used for the validation of complex flow simulations.
Within SAMURAI amongst others a large field dataset of the ground-based engine jet of the DLR research aircraft ATRA with various image-based experimental measurement systems. These are use to extent the aero-dynamic, -elastic and -acoustic knowledge of these two complex flow systems and for the validation of accompanying advanced numerical simulations.
Such measurement data are of high importance for the development, validation and combination of complex simulation tools, like CFD (URANS, DES, LES, DNS), CSM or CAA. Furthermore, the combined application of these measurement techniques enables the investigation of physical interrelations. These include the noise source mechanisms of vortical flows or the elastic effects of dynamical forces and moments on model parts.
With the numerical simulation tool TRACE complex DES simulations of the V2527 jet are performed. The comparison with the unsteady velocity field data from the PIV measurements of the engine jet enables the validation of this advanced simulation tool. The simulation results can be used to calculate the broadband noise component caused by the jet in the far field solver. Thus, a predictive capability for broadband noise by mixers is obtained.