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A review of the equations used to predict the velocity distribution within a ship’s propeller jet |
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| Authors: | W Lam GA Hamil YC Song S Raghunathan |
| Institution: | a Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China b School of Planning, Architecture and Civil Engineering, Queen's University Belfast, Belfast BT9 5AG, Northern Ireland c School of Mechanical and Aerospace Engineering, Queen's University Belfast, Belfast BT9 5AG, Northern Ireland |
| Abstract: | Predicting the velocity within the ship’s propeller jet is the initial step to investigate the scouring made by the propeller jet. Albertson et al. (1950) suggested the investigation of a submerged jet can be undertaken through observation of the plain water jet from an orifice. The plain water jet investigation of Albertson et al. (1950) was based on the axial momentum theory. This has been the basis of all subsequent work with propeller jets. In reality, the velocity characteristic of a ship’s propeller jet is more complicated than a plain water jet. Fuehrer and Römisch (1977), Blaauw and van de Kaa (1978), Berger et al. (1981), Verhey (1983) and Hamill (1987) have carried out investigations using physical model. Current paper reviews the state-of-art of the equations used to predict the time-averaged axial, tangential and radial components of velocity within the zone of flow establishment and the zone of established flow of a ship’s propeller jet. |
| Keywords: | Ship&rsquo s propeller jet Velocity distribution Seabed scour |
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