Wang, YoujiangYoujiangWangYang, ZhuangtaoZhuangtaoYangLiu, ZhenghaoZhenghaoLiuZhang, TaoTaoZhangYu, LongLongYu2024-04-092024-04-092024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46453The 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.enhttp://rightsstatements.org/vocab/InC/1.0/Acoustic Overlapping MeshHydrodynamic NoiseUnderwater Radiated NoiseCavitationAcoustic AnalogyEngineering and Applied OperationsConference Paper10.15480/882.931710.15480/882.931710.15480/882.9294Conference Paper