[en] Flutter as a self-feeding aeroelastic instability presents one of the biggest challenges in aero-engine designs to improve its aerodynamic and structural performance. This work presents a detailed feasibility study of using different viscoelastic patches as Constrained Layer Damping (CLD) enhancement for an aero-engine fan blade to reduce potential flutter risks. The static and dynamic responses of the different materials and configurations (thicknesses, layers and locations) are evaluated on both cruise and take-off/landing conditions. It is found that a double bi-layer 3M® ISD110 is the optimal choice of material for the CLD treatment for the fan blade. The study also shows that an optimal CLD treatment of 15 % total surface area of the blade at the root demonstrated a 36 % reduction in resonance amplitudes across the first six modes.
Disciplines :
Mechanical engineering
Author, co-author :
Santhosh, B; Department of Mechanical and Aerospace Engineering, University of Strathclyde, Aerospace Centre of Excellence, Glasgow, UK
Tufekci, M; Department of Mechanical Engineering, Dynamics Group, Imperial College London, London, UK
Salles, Loïc ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Department of Mechanical Engineering, Dynamics Group, Imperial College London, London, UK
Scarpa, F; Department of Aerospace Engineering, University of Bristol, Bristol Composite Institute, Bristol, UK
Yuan, J; Department of Mechanical and Aerospace Engineering, University of Strathclyde, Aerospace Centre of Excellence, Glasgow, UK ; Department of Mechanical Engineering, Dynamics Group, Imperial College London, London, UK
Language :
English
Title :
Flutter mitigation of turbofan blades using viscoelastic patches
Publication date :
12 September 2022
Event name :
30th International Conference on Noise and Vibration engineering (ISMA2022)
