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On the influence of elasticity on propeller performance: a parametric study

  • The aerodynamic performance of propellers strongly depends on their geometry and, consequently, on aeroelastic deformations. Knowledge of the extent of the impact is crucial for overall aircraft performance. An integrated simulation environment for steady aeroelastic propeller simulations is presented. The simulation environment is applied to determine the impact of elastic deformations on the aerodynamic propeller performance. The aerodynamic module includes a blade element momentum approach to calculate aerodynamic loads. The structural module is based on finite beam elements, according to Timoshenko theory, including moderate deflections. Several fixed-pitch propellers with thin-walled cross sections made of both isotropic and non-isotropic materials are investigated. The essential parameters are varied: diameter, disc loading, sweep, material, rotational, and flight velocity. The relative change of thrust between rigid and elastic blades quantifies the impact of propeller elasticity. Swept propellers of large diameters or low disc loadings can decrease the thrust significantly. High flight velocities and low material stiffness amplify this tendency. Performance calculations without consideration of propeller elasticity can lead to decreased efficiency. To avoid cost- and time-intense redesigns, propeller elasticity should be considered for swept planforms and low disc loadings.

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Author:Felix MöhrenORCiD, Ole BergmannORCiD, Frank Janser, Carsten Braun
ISSN:1869-5590 (Online)
ISSN:1869-5582 (Print)
Parent Title (English):CEAS Aeronautical Journal
Publisher:Springer Nature
Place of publication:Berlin
Document Type:Article
Year of Completion:2023
Date of the Publication (Server):2023/05/04
Tag:Aeroelasticity; Blade element method; Finite element method; Propeller; Propeller elasticity
First Page:311
Last Page:323
Corresponding author: Felix Möhren
Institutes:FH Aachen / Fachbereich Luft- und Raumfahrttechnik
collections:Verlag / Springer Nature
Licence (German):License LogoCreative Commons - Namensnennung