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Adaptive mesh refinement for trailing vortices generated by propellers in interaction with slipstream obstacles
Citation Link: https://doi.org/10.15480/882.8879
Publikationstyp
Journal Article
Date Issued
2023-11
Sprache
English
Author(s)
TORE-DOI
Volume
11
Issue
11
Article Number
2148
Citation
Journal of Marine Science and Engineering 11 (11): 2148 (2023-11)
Publisher DOI
Scopus ID
Publisher
Multidisciplinary Digital Publishing Institute
The investigation of cavitating trailing vortices emerging from marine propellers is of great interest in the industry. With the help of computational fluid dynamics (CFD), studying the cavitating trailing vortices may be facilitated. However, limitations in computational power raise the necessity to execute numerical simulations as efficiently as possible. The time-efficient simulation of cavitating trailing vortices interacting with rigid bodies is especially challenging due to the continuous change of cavity locations. This study investigates the usability, capability, and practicability of automatic adaptive refinement at every calculation time step for transient Reynolds-averaged Navier–Stokes (RANS) and large eddy CFD simulations of the cavitating tip and hub vortices, utilizing the Schnerr–Sauer cavitation model, in the presence of a rudder located in the propeller slipstream and for an isolated propeller, with additional focus on the computational effort necessary for using high frequency updating adaptive mesh refinement (AMR). It is found that AMR is suitable for resolving cavities with relative motion to the propeller and in interaction with slipstream obstacles. However, the computation time is significantly increased, which renders this method useful only if a classic AMR is not possible due to geometrical limitations. Even in the cases that benefit from the automated AMR, numerical instabilities may lead to unphysical pressure fluctuations, which reduce the suitability of the method for the evaluation of underwater radiated noise.
Subjects
adaptive mesh refinement
cavitating trailing vortices
rudder interaction
dynamic mesh
underwater radiated noise
DDC Class
620: Engineering
Publication version
publishedVersion
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jmse-11-02148.pdf
Type
Main Article
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25.65 MB
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