Modeling the Effects of Blade Dissimilarity on Rotor Vibrations for CH-47 Chinook Using a Viscous Vortex Particle Method
T. Pruijsers (TU Delft - Aerospace Engineering)
Roeland De Breuker – Mentor (TU Delft - Aerospace Structures & Computational Mechanics)
R.J.J. Bakker – Graduation committee member (Royal Netherlands Aerospace Centre NLR)
O. K. Bergsma – Graduation committee member (TU Delft - Structural Integrity & Composites)
L. L M Veldhuis – Graduation committee member (TU Delft - Flight Performance and Propulsion)
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Abstract
This work is a part of the Automated Rotor Blade Inspection (ARBI) project. ARBI aims to improve the rotorcraft RTB process with novel rotor blade measurement equipment such as 3D scanning, thermography and shearography. The research aims to quantify the effects of changes in blade properties on rotor vibration levels for CH-47 Chinook. This is done in order to create a rough ranking of which parameters have the highest impact on vibrations. This was performed by changing the blade properties on a single blade in the rotorcraft simulation tool FLIGHTLAB, trimming to a desired flight condition and collecting acceleration measurements. In FLIGHTLAB a novel inflow solver, the Viscous Vortex Particle Method (VPM) was applied, since the developers specified it was well suited for rotorcraft with rotor-on-rotor aerodynamic interaction. The results of this research in future hopefully will be able to help identify blades with poor RTB potential and help with suggesting blade sets with higher RTB success chance based on measurements from ARBI.