The following tasks provide a current cross section through our research activities. Experience shows that it is possible to adapt the given or a new task in a personal conversation to the individual interests and constraints.
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Thermographic investigation of the flow effects of erosion damage on wind turbine rotor blade leading edges.
The condition of the rotor blade leading edge significantly influences the aerodynamic properties of the rotor blades and thus the performance of the wind turbine. Damage primarily caused by erosion limits the service life of rotor blades and leads to high... » more
Thermographic detection and analysis of damage to rotor blade leading edges of wind turbines
The condition of the leading edge of the rotor blade significantly influences the aerodynamic properties of the rotor blade and thus the performance of the wind turbine. Damage caused primarily by erosion limits the lifetime of wind turbines and leads to high... » more
Deflection measurement of the forming stylus during incremental sheet metal forming
The increasing demand for customized sheet metal parts in small quantities requires a more economical man-ufacturing process than conventional deep drawing, which involves expensive, customized tools. » more
Spatially resolved temperature measurement in fluids using confocal fluorescence microscopy
The increasing demand for technical parts with micro dimensions increasingly requires the use of manufacturing techniques such as laser chemical manufacturing (LCM), whose non-contact material removal is based on a localized chemical reaction with an electrolyte... » more
Making the invisible visible: Automated localisation of flow transitions by means of image processing methods
The flow behaviour of rotor blades of wind turbines is influenced dynamically by ambient conditions and the condition of the rotor blades. The transition from laminar to turbulent flow can, for example, occur more prematurely than the planned flow transition due... » more
Measurement of dynamic flow conditions on wind turbines in operation
The aerodynamic flow behaviour of the rotor blades is crucial for the efficient operation of wind turbines. Depending on the geometric distribution of different flow conditions in the boundary layer near the surface, rotor blades exhibit a resulting lift and flow... » more
Investigation of dynamic deformations on wind turbines
Wind turbines must withstand enormous loads and deform under dynamically changing flow conditions. In order to investigate the dynamic behaviour, the deformations of the tower and rotor blades of a wind turbine during operation are to be measured over long... » more
Simulation of turbulent flow separation on wind turbines
Turbulent flow separation on rotor blades of wind turbines induces a sudden decrease of torque and an increase in drag. Besides aerodynamic performance loss, occur structural loads and increasing acoustic emissions. To be able to investigate the physical flow... » more
In-process deformation measurements in metalworking manufacturing processes
Deformation measurements based on speckle photography have been used for many years in special applications of production technology. In particular, the development of high-speed cameras with 4k resolution and the availability of ultra-short pulse lasers offer a... » more
Uncertainty analysis of refractive index distributions on tomographic PIV measurements
Particle Image Velocimetry is a standard optical measure-ment technique for the determination of flow velocity fields. Cameras are used to measure the particle movements as-sociated with the flow. The particle movement is used to re-construct the velocity field.... » more
Measurement of the refractive index fields of flames
The investigation of reactive flow processes such as flame flows is a current research area in process engi-neering and energy research. To characterize the dy-namics of these processes, optical flow measurement techniques are used in which the refractive index... » more
Thermographic flow visualization with defined angular movement of the camera system for optimal image distribution
Thermographic images can be used to visualize the near-surface boundary layer flow of rotor blades of wind turbines during operation (Figure 1). In order to achieve a high geometric resolution for the images from distances of up to 300 m, the surface of the rotor... » more
Reducing measurement uncertainty in speckle photography measurements
Speckle photography is an optical measuring method for high-resolution determination of deformations. "Speckles" are dots of light that are created when rough surfaces such as paper, wallpaper or metals are illuminated with a laser » more
IR thermographic flow visualisation on wind turbines
Turbulent flow separation on rotor blades of wind turbines induces a sudden decrease of torque and an increase in drag. Besides aerodynamic performance loss, occur structural loads and increasing acoustic emissions. » more
Design and characterization of a test stand for flow measurement
A current research question is the flow behavior of cooling lubricant during the supply in grinding processes. The particle image velocimetry (PIV) method is to be used. For this purpose, particles are fed to the coolant flow whose move-ments are measured by... » more
Realization of a self-calibrating setup for in-process deformation measurement based on speckle photography
Measuring systems based on speckle photography can detect shifts down to the nanometer range, in particular with the aid of complex optical systems (for example microscope objectives). » more
Expansion of renewable energies: Where to put the Energy?
The planning of powerlines and storage systems requires a precise knowledge of power transports in the network at different boundary conditions. The steady growth of renewables and their fluctuating power input will stress the transfer and distribution networks. » more
Simulation of a lateral scanning white-light interferometer
Rising demands for the surface quality of consumer and industrial products require fast and accurate metrology. White-light interferometry (WLI) is an established measurement method for topography on optically smooth surfaces. » more
Completed Theses you will find » here.