En-hui, ZhengZhengEn-huiYan-tao, CaoCaoYan-taoLiang-hao, XuXuLiang-haoXiao-xing, PengPengXiao-xing2024-04-122024-04-122024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46444With the increase of ship speeds and tonnages, and the need for improved propulsion efficiency, the occurrence of cavitation is becoming a more common phenomenon in ships. However, accurately predicting the risk of cavitation erosion remains a huge challenge due to its complexity. Based on the existing hydrodynamic mechanism, this paper attempts to develop a normal numerical method to predict the risk of cavitation erosion on marine propellers. First, the fluctuating pressure change rate at the ship's bottom plate between the minimum and maximum fluctuating pressure over one period is used to qualitatively assess the intensity of cavitation bubble collapse. By comparing numerical predictions with experimental and actual results, fluctuating pressure change rate exceeding 1.2×106 is established as the threshold for determining the presence of cavitation erosion risk. Second, when the local pressure and potential energy change rate on the propeller surface both are greater than 10% of the maximum pressure change rate and potential energy change rate over several cycles, the process is considered to have the potential to induce cavitation erosion risk. After meeting these conditions, the integration of potential energy change rates on the blade over several cycles reveals the distribution and intensity of cavitation erosion risk. This numerical prediction method for cavitation erosion risk was applied to five propellers. The numerical prediction results agree well with experimental results obtained through paint tests and actual cavitation erosion results. This validation confirms its engineering practicality.enhttp://rightsstatements.org/vocab/InC/1.0/Cavitation erosion riskNumerical prediction methodMarine propellerEngineering and Applied OperationsConference Paper10.15480/882.930810.15480/882.930810.15480/882.9294Conference Paper