Observations of the initial 3D flow from a ship's propeller

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The present paper was aimed at presenting the time-averaged velocity and turbulence intensity at the initial plane from a ship’s propeller. The flow characteristics of a ship’s propeller jet are of particular interest for the researchers investigating the jet induced seabed damage as documented in the previous studies. Laser Doppler Anemometry (LDA) measurements show that the axial component of velocity is the main contributor to the velocity magnitude at the initial plane of a ship’s propeller jet. The tangential component contributes to the rotation while the radial component which contributes to the diffusion, are the second and third largest contributors to the velocity magnitude. The maximum tangential and radial velocity components at the initial plane are approximately 82% and 14% of the maximum axial velocity component, respectively. The axial velocity distribution at the initial plane shows two peaked ridges with a low velocity core at the rotation axis. The turbulence intensity distribution shows a three-peaked profile at the initial plane.
LanguageEnglish
Pages1380-1388
Number of pages9
JournalOcean Engineering
Volume37
Issue number14-15
DOIs
Publication statusPublished - Oct 2010

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Ship propellers
Turbulence
Velocity distribution
Lasers

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title = "Observations of the initial 3D flow from a ship's propeller",
abstract = "The present paper was aimed at presenting the time-averaged velocity and turbulence intensity at the initial plane from a ship’s propeller. The flow characteristics of a ship’s propeller jet are of particular interest for the researchers investigating the jet induced seabed damage as documented in the previous studies. Laser Doppler Anemometry (LDA) measurements show that the axial component of velocity is the main contributor to the velocity magnitude at the initial plane of a ship’s propeller jet. The tangential component contributes to the rotation while the radial component which contributes to the diffusion, are the second and third largest contributors to the velocity magnitude. The maximum tangential and radial velocity components at the initial plane are approximately 82{\%} and 14{\%} of the maximum axial velocity component, respectively. The axial velocity distribution at the initial plane shows two peaked ridges with a low velocity core at the rotation axis. The turbulence intensity distribution shows a three-peaked profile at the initial plane.",
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Observations of the initial 3D flow from a ship's propeller. / Lam, Wei-Haur; Hamill, Gerard; Robinson, Desmond; Raghunathan, Srinivasan.

In: Ocean Engineering, Vol. 37, No. 14-15, 10.2010, p. 1380-1388.

Research output: Contribution to journalArticle

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