Servicenavigation

Project Details

Back

Projekt Print View

SFB 871:  Regeneration of Complex Capital Goods

Subject Area Mechanical and Industrial Engineering
Construction Engineering and Architecture
Computer Science, Systems and Electrical Engineering
Materials Science and Engineering
Social and Behavioural Sciences
Thermal Engineering/Process Engineering
Term from 2010 to 2021
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 119193472
 
Final Report Year 2022

Final Report Abstract

The CRC 871 "Regeneration of Complex Capital Goods" developed scientific fundamentals for the maintenance and repair of complex capital goods. The aim is to preserve or refurbish as many components as possible of the overall system such that the functional properties of the capital goods are restored ("regenerated") and, where possible, improved. As a typical example of such a complex capital good, the CRC 871 already chose a turbofan engine from civil aviation when applying for the first funding period. With these machines, all involved engineering disciplines are challenged to the limits of physical knowledge and design methods. This applies both to the computational verification of the functionality of the regenerated components and the simulation of the effects of regeneration on the achievement of the technical and economic goals e.g. specific fuel (kerosene) consumption or remaining service life of the components, as well as to the challenges of regeneration in terms of materials science and manufacturing technology. The innovative approach of the CRC 871 went beyond the state of the art in science at that time, in that not only were individual repair processes improved but also the options for repairs could be systematically compared to each other. This affects the decision as to whether a worn component should continue to be used as it is, whether it should be scrapped and replaced by a spare part, or whether and, if so, how it should be repaired. On one hand, this requires the evaluation of the options for repair according to functional criteria, e.g. performance, to assess to what extent the functional objectives are achieved. On the other hand, this also requires an evaluation of the time and cost for the necessary repair. For these decisions and the considered regeneration processes, some components were selected, which are both technically relevant for regeneration and scientifically challenging, i.e. in the first funding period a high-pressure turbine blade and in the second funding period a compressor blisk. The third funding period then focused on the effects of regeneration on the overall system and the optimization of regeneration processes. In addition to the many publications, the progress made by the work of CRC 871 is evident in a system demonstrator which was set up in the third funding period, which regenerates of a turbine blade and for this pupose integrates the results of almost all subprojects of the CRC 871. To this end, the vision of a new regeneration process in which a rule-based decision can be made in a virtual environment was implemented, and was implemented based on a digital twin of an engine . On one hand, this made it possible to apply the results of the basic scientific results. On the other hand, it also demonstrated that virtualization is necessary to efficiently and effectively apply the regeneration of complex capital goods, both ecologically and economically. In addition to bringing together many scientific results and demonstrating the benefits through this system demonstrator, the transfer of the developed scientific results to other complex capital goods - transformers, stationary gas turbines for power plants, and wind turbines - was demonstrated. The transfer takes place in transfer projects by DFG and in projects derived from the CRC 871 but financed outside the DFG funding, e.g. by the BMWi or industry. Despite the restrictions caused by the COVID-19 pandemic, the public relations work in the final phase of the CRC 871 was able to communicate the successful basic research of the projects to a broad audience. Prposals for a further 17 transfer projects (of which 4 have already been realised) were submitted for application and 15 of them are recommended for funding by the reviewers. With its results, the CRC 871 significantly strengthens the established focus on production at Leibniz University Hannover (LUH) and the emerging focus on energy. The collaboration within LUH and with TU Braunschweig has laid a foundation for further projects in the field of mobility. The participation of scientists from Leibniz University Hannover in CRC 880 "High Lift of Future Commercial Aircraft" at TU Braunschweig and many scientists from CRC 871 were involved in the successful proposal for the Cluster of Excellence ExC 2163 SE²A - „Sustainable and Energy Efficient Aviation“led by TU Braunschweig.

Publications

 
 

Additional Information

© 2026 DFG Disclaimer / Copyright / Privacy Policy

Textvergrößerung und Kontrastanpassung