As part of the research programme supported by the National Foundation for co-ordination of Maritime Research in the Netherlands, full scale experiments were performed on board a roll-on roll-off (ro-ro) container ship to determine the acoustic performance of a highly skewed propeller.

Propeller cavitation is an important cause of vibration and noise in the afterbody of present day ships. The highly skewed propeller investigated in the present day ships.

The highly skewed propeller investigated in the present study was predicted to have better cavitation characteristics than a conventional propeller with no loss in propulsion efficiency.

Therefore, the main goal of the experimental programme was to determine the acoustic source strength and frequency spectrum of the fluctuating volume of propeller cavitation.

In addition, vibration levels in the stern of the vessel and sound pressure levels in accommodation and work spaces were recorded.

The present data is compared with:

1. Similar data obtained in 1979 for the same vessel equipped with a conventional propeller; and

2. Semi-empirical predictions of acoustic source strength of propeller cavitation.

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