Investigation of the viscous resistance components of catamaran forms
Investigation of the viscous resistance components of catamaran forms
Research into the breakdown of resistance components of catamaran hull forms has been carried out over a number of years. The components consist of viscous and wave resistance as well as viscous and wave resistance interference. Significant investigation of wave resistance has been carried out. Less effort, however, has been dedicated to determining viscous resistance and viscous interference resistance, which can be important elements in the estimation of power for a new design.
Investigations into the components of viscous resistance have been carried out experimentally using a low-speed wind tunnel and numerically using a commercial CFD code (CFX). The investigations used representative reflex models of multihull ships and investigated the components of viscous resistance and viscous interaction effects between the hulls.
The experimental work was carried out on a single ellipsoid and a pair of ellipsoids in proximity, and the CFD investigations were carried out on (1) a single ellipse and a pair of ellipses in proximity, (2) a single ellipsoid and a pair of ellipsoids in proximity and (3) single and twinhull configurations of round bilge/transom stem ship forms. In the experimental work, the tests were carried out without and with turbulence transition strip at separation of length (S/L) ratios of 0.27, 0.37, 0.47 and 0.57, and at Reynolds number values of 1.6x106, 2.4x106 and 3.2x106. In the numerical work, the investigations were conducted at the same S/L ratios, two- and three-dimensional, under turbulent flow condition and at a Reynolds number of 2.4x106. The CFD work was extended to a higher Reynolds number in order to investigate the scale effect.
University of Southampton
Utama, I Ketut Aria Pria
af5d1f70-acda-41d8-b243-0632e995a044
1999
Utama, I Ketut Aria Pria
af5d1f70-acda-41d8-b243-0632e995a044
Utama, I Ketut Aria Pria
(1999)
Investigation of the viscous resistance components of catamaran forms.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Research into the breakdown of resistance components of catamaran hull forms has been carried out over a number of years. The components consist of viscous and wave resistance as well as viscous and wave resistance interference. Significant investigation of wave resistance has been carried out. Less effort, however, has been dedicated to determining viscous resistance and viscous interference resistance, which can be important elements in the estimation of power for a new design.
Investigations into the components of viscous resistance have been carried out experimentally using a low-speed wind tunnel and numerically using a commercial CFD code (CFX). The investigations used representative reflex models of multihull ships and investigated the components of viscous resistance and viscous interaction effects between the hulls.
The experimental work was carried out on a single ellipsoid and a pair of ellipsoids in proximity, and the CFD investigations were carried out on (1) a single ellipse and a pair of ellipses in proximity, (2) a single ellipsoid and a pair of ellipsoids in proximity and (3) single and twinhull configurations of round bilge/transom stem ship forms. In the experimental work, the tests were carried out without and with turbulence transition strip at separation of length (S/L) ratios of 0.27, 0.37, 0.47 and 0.57, and at Reynolds number values of 1.6x106, 2.4x106 and 3.2x106. In the numerical work, the investigations were conducted at the same S/L ratios, two- and three-dimensional, under turbulent flow condition and at a Reynolds number of 2.4x106. The CFD work was extended to a higher Reynolds number in order to investigate the scale effect.
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Published date: 1999
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Local EPrints ID: 463781
URI: http://eprints.soton.ac.uk/id/eprint/463781
PURE UUID: 1c1d0290-5320-4df4-9659-3d2e96fc935a
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Date deposited: 04 Jul 2022 20:57
Last modified: 16 Mar 2024 19:05
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Author:
I Ketut Aria Pria Utama
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