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Publisher DOI: 10.3390/jmse9070778
Title: Application of large eddy simulation to predict underwater noise of marine propulsors. Part 2: Noise generation
Language: English
Authors: Kimmerl, Julian 
Mertes, Paul 
Abdel-Maksoud, Moustafa  
Keywords: underwater radiated noise;propeller cavitation;implicit LES;Scale resolved turbulence;cavitating tip vortex
Issue Date: Jul-2021
Publisher: MDPI
Source: Journal of marine science and engineering 9 (7) : 778 (2021-07)
Journal: Journal of marine science and engineering 
Abstract (english): 
Methods to predict underwater acoustics are gaining increased significance, as the propulsion industry is required to confirm noise spectrum limits, for instance in compliance with classification society rules. Propeller-ship interaction is a main contributing factor to the underwater noise emissions by a vessel, demanding improved methods for both hydrodynamic and high-quality noise prediction. Implicit large eddy simulation applying volume-of-fluid phase modeling with the Schnerr-Sauer cavitation model is confirmed to be a capable tool for propeller cavitation simulation in part 1. In this part, the near field sound pressure of the hydrodynamic solution of the finite volume method is examined. The sound level spectra for free-running propeller test cases and pressure pulses on the hull for propellers under behind ship conditions are compared with the experimental measurements. For a propeller-free running case with priory mesh refinement in regions of high vorticity to improve the tip vortex cavity representation, good agreement is reached with respect to the spectral signature. For behind ship cases without additional refinements, partial agreement was achieved for the incompressible hull pressure fluctuations. Thus, meshing strategies require improvements for this approach to be widely applicable in an industrial environment, especially for non-uniform propeller inflow.
DOI: 10.15480/882.3776
ISSN: 2077-1312
Institute: Fluiddynamik und Schiffstheorie M-8 
Document Type: Article
Project: MarTERA - Experimentelle, analytische und numerische Untersuchung und Modellierungen von Eislasten am Propeller 
Effiziente Methoden zur Bestimmung der vom Propeller induzierten hydroakustischen Abstrahlung 
Funded by: Bundesministerium für Wirtschaft und Energie - BMWi 
European Union 
More Funding information: This research was funded by the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 728053-MarTERA, represented by BMWI in Germany, grant number 03SX461C as part of the ProNoVi joint research project.
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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