Zhai, Shu-ChengShu-ChengZhaiXiong, Zi-YingZi-YingXiongHong, Fang-WenFang-WenHong2024-04-172024-04-172024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46442The underwater radiated noise of the propeller was studied in this paper using a CFD method in combination with the acoustic analogy equation. The loading noise excited by the turbulent pulsation pressure and the thickness noise caused by the rotational motion of the propeller were obtained by the LES method. Then, the propeller noise was predicted using the Formulation 1A integral formula. The boundary layer characteristics of the blade surface were analyzed, and the characteristics of wall fluctuating pressure were extracted and analyzed. Due to the existence of pressure gradients on the suction surface and the pressure surface, it is difficult to obtain uniform pulsating pressure dimensionless results by using the internal or external parameters of the boundary layer, and this feature is more obvious at the 0.7R radius of the blade. Finally, the acoustic analogy method was used to predict the propeller noise. The 1.25 kHz frequency band was in good agreement with the experimental results. Through the analysis of thickness noise and loading noise source characteristics, the noise of the blade generated in this frequency band mainly came from the loading noise. The results can serve as a technical guide for the investigation of propeller underwater radiated noise.enhttp://rightsstatements.org/vocab/InC/1.0/Propeller noiseCFDFW-HAcoustic analogy methodFluctuating pressureEngineering and Applied OperationsConference Paper10.15480/882.930610.15480/882.930610.15480/882.9294Conference Paper