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Session: Rotary aeroelasticity 1
Session starts: Tuesday 18 June, 13:30
Presentation starts: 13:30
Room: Room 1.6

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Christopher Koch (German Aerospace Center (DLR), Institute of Aeroelasticity)

Abstract:
The transfer-matrix (TM-) method for propeller whirl flutter analysis is based on frequency-domain transfer functions from propeller hub motion to loads, which are identified from time-domain propeller models. These transfer functions can be nonlinear with respect to frequency, e.g., due to unsteady aerodynamics. This paper presents a simplified version of the TM-method based on linearized transfer function compatible with legacy whirl flutter workflows based on propeller derivatives. It will present a comparison of whirl flutter results with a full aircraft configuration obtained using either fully frequency-dependent or linearized transfer matrices using various aerodynamic methods.