Velocity and concentration field of discharge from a boat propeller

Situ, R., Brown, R.J., and Loberto, A. (2009) Velocity and concentration field of discharge from a boat propeller. In: Proceedings of ExHFT-7 7th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, p. 991. From: ExHFT-7 7th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, 28 June - 3 July, 2009, Krakow, Poland.

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Abstract

Two-stroke outboard boat engines using total loss lubrication deposit a significant proportion of their lubricant and fuel directly into the water. The purpose of this work is to document the velocity and concentration field characteristics of a submerged swirling water jet emanating from a propeller in order to provide information on its fundamental characteristics. Measurements of the velocity and concentration field were performed in a turbulent jet generated by a model boat propeller (0.02 m diameter) operating at 1500 rpm and 3000 rpm. The measurements were carried out in the Zone of Established Flow up to 50 propeller diameters downstream of the propeller. Both the mean axial velocity profile and the mean concentration profile showed selfsimilarity. Further, the stand deviation growth curve was linear. The effects of propeller speed and dye release location were also investigated.

Item ID: 21525
Item Type: Conference Item (Refereed Research Paper - E1)
Keywords: propeller, swirl jet, turbulence, concentration field, self-similarity
ISBN: 978-83-7464-235-4
Date Deposited: 20 Aug 2012 04:22
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 50%
09 ENGINEERING > 0905 Civil Engineering > 090508 Water Quality Engineering @ 50%
SEO Codes: 96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961199 Physical and Chemical Conditions of Water not elsewhere classified @ 50%
88 TRANSPORT > 8898 Environmentally Sustainable Transport > 889805 Management of Solid Waste from Transport Activities @ 50%
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