Developments of DIC techniques for propeller blade deformation measurements and in-flight applications

Abstract

For the development of design tools for the optimization of advanced propulsion system adequate validation data is required. Especially measurements on aircraft engines and their components are a special challenge. With increasing fan diameters or Open Rotor concepts the knowledge of the blade deformation becomes more significant. Within the Cross-Demonstrator- (XDC-) activities Large Passenger Aircraft (LPA) Platform the optical non-intrusive DIC-method IPCT of the DLR was further developed with special focus on blade deformation measurements and in-flight application. This included the further development of tools to optimize the measurement set-up as well as the improvement of the evaluation software and post -processing routines. Within the paper it is demonstrated on blade deformation measurements performed on a rotor test stand and measurements on the Dassault Falcon 2000EX DLR-ISTAR.