Numerical investigation into the effects of tip vortex cavitation on propeller underwater radiated noise (URN) using a hybrid CFD method

This study explores the influence of tip vortex cavitation (TVC) on propeller induced URN using a hybrid CFD method. The cavitating flow around model and full-scale benchmark belong to Newcastle University's research vessel, Princess Royal, operating under uniform, inclined non-uniform conditions were solved DES mass transfer model. recently developed advanced mesh refinement (V-AMR) technique was incorporated into calculations for better modelling realising TVC in slipstream. enabled inclusion nonlinear noise sources, mainly represented by turbulence vorticity, including TVC, effectively accurate prediction URN. numerical conducted where only sheet modelled without V-AMR together understand contribution overall results first validated with available experimental data obtained scale test campaign tunnel sea-trial propeller's hydrodynamic performance characteristics, extensions showed that minimal stable structured present (i.e., uniform conditions). However, when dynamics pulsation dominant, unstructured unstable observed compared observations conditions. created several spikes, which can be associated its strong possible collapsing/bursting phenomena. These spikes time domain acoustic pressure signal consequently contributed at different frequency ranges spectrum increased levels up 15 dB predictions present. • caused domain, resulted higher levels. unstable/unstructured considerably propellers