Flutter mitigation of turbofan blades using viscoelastic patches

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Manayil Santhosh, B. and Tufekci, M. and Salles, L. and Scarpa, F. and Yuan, J. (2022) Flutter mitigation of turbofan blades using viscoelastic patches. In: Proceedings of ISMA 2022 - International Conference on Noise and Vibration Engineering and USD 2022 - International Conference on Uncertainty in Structural Dynamics, 2022-09-12 - 2022-09-14, Leuven Belgium.

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Abstract

Flutter as a self-feeding aeroelastic instability presents one of the biggest challenges in aero-engine designsto improve its aerodynamic and structural performance. This work presents a detailed feasibility study ofusing different viscoelastic patches as Constrained Layer Damping (CLD) enhancement for an aero-enginefan blade to reduce potential flutter risks. The static and dynamic responses of the different materials andconfigurations (thicknesses, layers and locations) are evaluated on both cruise and take-off/landingconditions. It is found that a double bi-layer 3M® ISD110 is the optimal choice of material for the CLDtreatment for the fan blade. The study also shows that an optimal CLD treatment of 15 % total surface areaof the blade at the root demonstrated a 36 % reduction in resonance amplitudes across the first six modes.

ORCID iDs

Manayil Santhosh, B., Tufekci, M., Salles, L., Scarpa, F. and Yuan, J. ORCID logoORCID: https://orcid.org/0000-0002-2411-8789;
CORE (COnnecting REpositories)