Physical Modeling of the Hydroacoustic Field of a Marine Propeller

The paper presents a research of the acoustic field of the propeller, including at the resonant frequencies of its blades. The research is based on a computational and experimental approach based on the combined use of numerical and experimental physical modeling. The paper shows the importance of taking into valuation the elastic resonances of the propeller in the design, demonstrates the methods of physical and numerical modeling used, which provide high accuracy in determining the resonance frequencies of the blades in water and in air. Using the example of two propeller models made of different materials, the effect of Q-factor on the levels and type of the radiation spectrum is experimentally demonstrated.