Concepts for Cavitation Alleviation of Banded and Ducted Rotor Tips
1991
Yates, John E. | Parker, Stephen F.
This study explored concepts and recommend geometries for alleviating the cavitation sensitivity of blade-band junctions of banded and ducted underwater propellers. A lifting surface model of the tip region of the blade, the band and the duct wall was used to calculate in detail the blade load carry- over onto the band and the duct wall. Geometry modifications of the blade tip and the band camber were made to alleviate cavitation sensitivity. Two- dimensional models were used to assess the effect of blade and band thickness. Both design and analysis type codes were used. It is concluded that, with proper use of band camber, the suction pressure in the blade band junction can be tailored to alleviate cavitation.
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