This project is to investigate the velocity profile and turbulence intensity within a ship's propeller wash using a joint computational and experimental approach. Ship's propeller jet consists of two zones, the zone of flow establishment (ZFE) and the zone of established flow (ZEF). In these zones, the axial, tangential and radial components of velocity are predicted using computational fluid dynamics (CFD). The CFD predictions show the axial component of velocity is predominant in the propeller wash. This is followed by the tangential component of velocity, which contributes to rotation of the jet, arid the radial component of velocity, which contributes to the jet diffusion. Laser Doppler Anemometry (LDA) is employed to measure the velocity magnitudes within these two zones allowing the validation of the CFD predictions. The investigation suggests the most appropriate choice of the turbulence model, rotating model, discretisation scheme, computational geometry and the grid type to be used to simulate a ship's propeller wash. A comparison between the current experimental measurements and the earlier works are also presented.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:491706 |
| Date | January 2008 |
| Creators | Lam, Wei-Haur |
| Publisher | Queen's University Belfast |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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