Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise Generation
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 emission...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/9/7/778 |
| _version_ | 1797526819214196736 |
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| author | Julian Kimmerl Paul Mertes Moustafa Abdel-Maksoud |
| author_facet | Julian Kimmerl Paul Mertes Moustafa Abdel-Maksoud |
| author_sort | Julian Kimmerl |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T09:35:43Z |
| format | Article |
| id | doaj.art-ce3c212e31d1413f8d72bf30cc10fc9f |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T09:35:43Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-ce3c212e31d1413f8d72bf30cc10fc9f2023-11-22T04:09:35ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-07-019777810.3390/jmse9070778Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise GenerationJulian Kimmerl0Paul Mertes1Moustafa Abdel-Maksoud2SCHOTTEL GmbH, Schottelstr. 1, 56281 Dörth, GermanySCHOTTEL GmbH, Schottelstr. 1, 56281 Dörth, GermanyAm Schwarzenberg-Campus 4(C), Institute for Fluid Dynamics and Ship Theory (FDS), University of Technology (TUHH), 21073 Hamburg, GermanyMethods 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.https://www.mdpi.com/2077-1312/9/7/778underwater radiated noisepropeller cavitationimplicit LESScale resolved turbulencecavitating tip vortex |
| spellingShingle | Julian Kimmerl Paul Mertes Moustafa Abdel-Maksoud Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise Generation Journal of Marine Science and Engineering underwater radiated noise propeller cavitation implicit LES Scale resolved turbulence cavitating tip vortex |
| title | Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise Generation |
| title_full | Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise Generation |
| title_fullStr | Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise Generation |
| title_full_unstemmed | Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise Generation |
| title_short | Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise Generation |
| title_sort | application of large eddy simulation to predict underwater noise of marine propulsors part 2 noise generation |
| topic | underwater radiated noise propeller cavitation implicit LES Scale resolved turbulence cavitating tip vortex |
| url | https://www.mdpi.com/2077-1312/9/7/778 |
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