Abstract
Noise measurements of the tip vortex cavitation generated by a large model hydrofoil and its one-quarter scale model are presented to discuss the features of tip vortex cavitation (TVC) noise and noise scaling. The concept of the TVC noise envelope is introduced to divide the cavitation noise into incipient and fully developed TVC noise. The cavitation noise scaling method of Bojorheden and Astrom is compared with the method of Levkovskii for scaling the fully developed TVC noise. A theoretical model of the cavitation nuclei spiraling around an idealized Rankine vortex is introduced to model the characteristic bursts in the incipient TVC noise and predict the inception of TVC noise. The simulation results for the large and small foils are shown to be in good agreement with the experimental noise measurements.
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