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Further development and discrepancy analysis of the acoustic overlapping mesh technique
Citation Link: https://doi.org/10.15480/882.9317
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
Key Laboratory of Marine Intelligent Equipment and System, Ministry of Education, Shanghai, China
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an, Shaanxi, China; Kunming Branch of the 705 Research Institute, China State Shipbuilding Corporation Limited, Kunming, China
Marine Design and Research Institute of China, Shanghai, China
Kunming Branch of the 705 Research Institute, China State Shipbuilding Corporation Limited, Kunming, China
Key Laboratory of Marine Intelligent Equipment and System, Ministry of Education, Shanghai, China; School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China
TORE-DOI
Start Page
249
End Page
256
Citation
8th International Symposium on Marine Propulsors (smp 2024)
Contribution to Conference
Publisher
Norwegian University of Science and Technology, Department of Marine Technology
ISBN
978-82-691120-5-4
Peer Reviewed
true
The acoustic overlapping mesh (AOM) technique proposed by the author is extended by clustering CFD cells on solid surfaces. Three causes for the discrepancy between the source level spectrum obtained with the original CFD mesh and the AOM technique are identified and analyzed. The discrepancy from two of the three causes could be controlled by defining the acoustic mesh size correctly. The guidelines for the acoustic mesh size are given theoretically and verified by numerical simulations. The discrepancy from one cause is complicated and needs more investigation. The cavitating Delft twist foil is used as the simulation case. A clear reduction in acoustic evaluation time is observed. Compared to the calculation with the original CFD mesh, the AOM technique could help reduce the computational time by more than 99% while maintaining a spectrum discrepancy of around 1dB.
Subjects
Acoustic Overlapping Mesh
Hydrodynamic Noise
Underwater Radiated Noise
Cavitation
Acoustic Analogy
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
Wang-FurtherDevelopmentAndDiscrepancyAnalysisOfTheAcousticOverlapping-1129-1-final.pdf
Type
Main Article
Size
1.55 MB
Format
Adobe PDF