The vortex types of cavitation, with few exceptions, occur at the blade tips, the leading edge and hub of the propeller and they are generated from the low-pressure core of the shed vortices. The hub vortex is formed by the combination of the individual vortices shed from each blade root, and although individually these vortices are unlikely to cavitate, under the influence of a converging propeller cone the combination of the blade root vortices has a high susceptibility to cavitate. When
this occurs the resulting cavitation is normally very stable and appears to the observer as a rope with strands corresponding to the number of blades of the propeller.
this occurs the resulting cavitation is normally very stable and appears to the observer as a rope with strands corresponding to the number of blades of the propeller.
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