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Investigation of the effect of propeller flexibility on cavitation formation and hydrodynamic coefficients

In this paper, the dynamical response of a propeller in the cavitation and non-cavitation flows at different rake angles is investigated. Fluid and Structure Interaction (FSI) simulation was performed using ANSYS–CFX software. To simulation the cavitation flow around the propeller, flow is considere...

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Bibliographic Details
Published in:Journal of marine science and technology 2022-09, Vol.27 (3), p.1116-1129
Main Authors: Sajedi, Hasan, Mahdi, Miralam
Format: Article
Language:English
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Summary:In this paper, the dynamical response of a propeller in the cavitation and non-cavitation flows at different rake angles is investigated. Fluid and Structure Interaction (FSI) simulation was performed using ANSYS–CFX software. To simulation the cavitation flow around the propeller, flow is considered as a homogeneous mixture and Zwart–Gerber–Belamri’s cavitation model was used. First, the validation of cavitation flow around the E779a propeller was carried out, and considering the comparison of experimental and numerical results, there is a good match between thrust, torque coefficients and volume of cavity. To ensure the simulation of two-way fluid–structure interaction, the results of NACA66 hydrofoil are compared with experimental results, which indicate a good agreement. In the following, the cavitation and non-cavitation flows around the rigid and flexible propellers (B-series) at different rake angles have been investigated. The results show that at uniform flow, changes in rake angle do not have a significant effect on the performance of rigid propellers, while for flexible propellers, the hydrodynamic loads would cause bending and twisting deformations of the blade. Therefore, in the analysis of flexible composite propellers, it is very important to consider the effect of fluid–structural interaction.
ISSN:0948-4280
1437-8213
DOI:10.1007/s00773-022-00892-8