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Fluid–Structure Interaction Vibration Experiments and Numerical Verification of a Real Marine Propeller Cover

Fluid–Structure Interaction Vibration Experiments and Numerical Verification of a Real Marine Propeller

By: Benqiang Lou and  Hongyu Cui  
Open Access
|Oct 2021

Abstract

The design of lifting blade shapes is a key engineering application, especially in domains such as those of marine propellers, hydrofoils, and tidal energy converters. In particular, the excitation frequency must be different from that of the structure to avoid resonance. The natural frequency in the cases where the fluid–structure interaction (FSI) is considerably different if considering the coupling added mass (AM) of the water. In this study, vibration experiments were performed using a real propeller in air and water. The modal parameters, natural frequencies, and mode shapes were determined. Validations were performed using 3D solid and acoustic elements in a direct coupling finite element format. The modal results and AM ratios were in agreement with the experimental results. Convenient application and high efficiency are basic requirements for an engineering application. Therefore, an empirical formula was established for the first-order FSI natural frequency to enable rapid estimation, thereby satisfying this requirement.

DOI: https://doi.org/10.2478/pomr-2021-0034 | Journal eISSN: 2083-7429 | Journal ISSN: 1233-2585
Language: English
Page range: 61 - 75
Published on: Oct 22, 2021
Published by: Gdansk University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2021 Benqiang Lou, Hongyu Cui, published by Gdansk University of Technology
This work is licensed under the Creative Commons Attribution 4.0 License.