Conference proceeding
Vortex Shedding and Roll Damping for Hulls With Rounded Bilges
Volume 7A: Ocean Engineering, Vol.7
ASME 2019: 38th International Conference on Ocean, Offshore and Arctic Engineering (Glasgow, Scotland, 09/06/2014 - 14/06/2014)
09/06/2019
Metrics
10 Record Views
Abstract
Vortex shedding and eddy generation can provide a substantial contribution to the hydrodynamic roll damping of vessels. While sharp-edge bilge geometries generally result in greater damping, a more rounded bilge may be beneficial for the other ship motions and mooring design. To this end, the effect of the bilge rounding on the vortex shedding dynamics and the hydrodynamic damping of hulls is investigated numerically. A series of new computations of the response of hulls with differing bilge radii and subject to forced oscillatory motion are reported. The severity of the vortex shedding and the magnitude of the damping is shown to depend strongly on the bilge geometry. Computations using an efficient isolated edge discrete vortex model are also found to be generally in qualitative agreement with the CFD results. The results extend the relatively scarce literature on the effect of bilge rounding and can assist in informing hull design and concept selection.
Details
- Title
- Vortex Shedding and Roll Damping for Hulls With Rounded Bilges
- Creators
- Ian A Milne - University of Western AustraliaFeifei Tong - University of Western AustraliaJ. Michael R Graham - Imperial College London
- Publication Details
- Volume 7A: Ocean Engineering, Vol.7
- Conference
- ASME 2019: 38th International Conference on Ocean, Offshore and Arctic Engineering (Glasgow, Scotland, 09/06/2014 - 14/06/2014)
- Publisher
- American Society of Mechanical Engineers; New York
- Identifiers
- 991013041312202368
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Conference proceeding