Phasing of blade structural and aerodynamic mistuning to enhance aeroelastic performance

Applications: Turbomachinery blade design and optimisation for improving aeroelastic performance

Intentional phasing between the structural and the aerodynamic mistuning can be exploited to improve turbomachinery blade aeroelastic performance, while reducing the manufacturing scrap rate.

Features	Benefits
Blade structural (frequency) mistuning and aerodynamic (shape) mistuning are measured/designed independently, then combined to form an optimum pattern	Combining structural and aerodynamic mistuning has a potential to improve both flutter and forced response, and exceeding the limitation of each individual mistuning method
The patterns can be chosen at design stage or modified maintenance/refurbishment stage	Optimising the aeroelastic performance and reducing the scrap rate because manufacturing tolerance is increased
Structural and aerodynamic mistuning effects can be evaluated independently using their established routines, their combinations can be predicted using linear superposition	Linear superposition was showed to be reliable in predicting the best and worse combination patterns. It is fast and requires minimal changes in existing evaluation routines.

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Phasing of blade structural and aerodynamic mistuning to enhance aeroelastic performance

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