Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8062509 | Ocean Engineering | 2018 | 12 Pages |
Abstract
The main objective of the present study is to establish a practical design strategy of air-balloons for a suppression of the propeller cavitation induced hull pressures at multi frequencies. Theoretical foundation is initiated with the existing modal series solution of a multiple scattering problem. An approximated form is then derived by a monopole regime which is valid in a low frequency range. Subsequent parametric analysis with a variation of the separation distance between the balloons provides an analytical evidence that the mutual interaction can be neglected unless they are too close to each other. Hence it is addressed that the individual balloon can be designed separately without a consideration of their coupling characteristics. Finally, the water tunnel test with two balloons demonstrates noticeable vibration reductions at the first- and second- order of blade passing frequencies by 72% and 59%, respectively.
Related Topics
Physical Sciences and Engineering
Engineering
Ocean Engineering
Authors
Jeung-Hoon Lee, Kyung-Jun Lee, Boo-Ki Kim,