Marine propeller underwater radiated noise prediction with the FWH acoustic analogy Part 2: Assessment of model scale propeller hydroacoustic performance under non-uniform flow conditions

This study presents the model scale benchmark, The Princess Royal, propeller's hydrodynamic performance, including cavitation extensions and URN operating in a non-uniform wake field. developed V-AMR technique was used numerical calculations to accurately solve tip vortex flow better representation (TVC) propeller slipstream. sheet modelled using Schnerr-Sauer model. A hybrid method, combining DES permeable formulation of FWH equation, for predicting at four different conditions corresponding full-scale conditions. results were first validated with experimental data obtained tunnel through characteristics, extension scale. Then, predictions method extrapolated ITTC extrapolation procedure compare measurements. showed that on off blades satisfactorily predicted compared model-scale campaigns sea trial observations. However, same dynamics TVC could not be where weak incipient present between test campaign. Also, underpredicted certain frequencies data, except highest loading condition. Akin comparisons generally frequency range noise spectrum underprediction can associated lack dynamics, especially TVC,