Model tests of a tlp floating offshore wind turbine with a porous outer column

Ed Mackay; Lars Johanning; Wei Shi; Dezhi Ning

Model tests of a tlp floating offshore wind turbine with a porous outer column

Ed Mackay
, Lars Johanning
, Wei Shi
, Dezhi Ning

School of Engineering, Computing and Mathematics

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings published in a book › peer-review

Abstract

This paper presents the results of scaled model tests of a tension leg platform (TLP) for a floating wind turbine, comprising a central solid cylinder with a porous outer cylinder. Tests were conducted with outer cylinders with porosities of 0%, 15% and 30% and compared to a base case with no outer cylinder. For each configuration, the total mass and centre of mass are kept constant to allow consistent comparison. It is shown that for the cases with a solid outer cylinder the surge motion resonance is shifted to a lower frequency due to the entrained mass of water inside and increased added mass of the outer cylinder. Increasing the porosity of the outer cylinder is shown to increase the frequency of the resonant response, bringing the resonant frequency closer to that of the base case with no outer cylinder. Increasing the porosity of the outer cylinder also reduces the amplitude of the resonant response. The use of a porous outer layer increases the quadratic drag on the body and significantly reduces the low frequency resonant response where the radiation damping is low.

Original language	English
Title of host publication	30th International Ocean and Polar Engineering Conference
Publisher	International Society of Offshore and Polar Engineers
Pages	308-316
Number of pages	9
ISBN (Electronic)	9781880653845
Publication status	Published - 2020
Event	30th International Ocean and Polar Engineering Conference, ISOPE 2020 - Virtual, Online Duration: 11 Oct 2020 → 16 Oct 2020

Publication series

Name	Proceedings of the International Offshore and Polar Engineering Conference
Volume	2020-October
ISSN (Print)	1098-6189
ISSN (Electronic)	1555-1792

Conference

Conference	30th International Ocean and Polar Engineering Conference, ISOPE 2020
City	Virtual, Online
Period	11/10/20 → 16/10/20

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

ASJC Scopus subject areas

Energy Engineering and Power Technology
Ocean Engineering
Mechanical Engineering

Keywords

Floating Offshore Wind Turbine
Hydrodynamic Response
Motion Damping
Renewable Energy

Cite this

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title = "Model tests of a tlp floating offshore wind turbine with a porous outer column",

abstract = "This paper presents the results of scaled model tests of a tension leg platform (TLP) for a floating wind turbine, comprising a central solid cylinder with a porous outer cylinder. Tests were conducted with outer cylinders with porosities of 0\%, 15\% and 30\% and compared to a base case with no outer cylinder. For each configuration, the total mass and centre of mass are kept constant to allow consistent comparison. It is shown that for the cases with a solid outer cylinder the surge motion resonance is shifted to a lower frequency due to the entrained mass of water inside and increased added mass of the outer cylinder. Increasing the porosity of the outer cylinder is shown to increase the frequency of the resonant response, bringing the resonant frequency closer to that of the base case with no outer cylinder. Increasing the porosity of the outer cylinder also reduces the amplitude of the resonant response. The use of a porous outer layer increases the quadratic drag on the body and significantly reduces the low frequency resonant response where the radiation damping is low.",

keywords = "Floating Offshore Wind Turbine, Hydrodynamic Response, Motion Damping, Renewable Energy",

author = "Ed Mackay and Lars Johanning and Wei Shi and Dezhi Ning",

note = "Publisher Copyright: {\textcopyright} 2020 by the International Society of Offshore and Polar Engineers (ISOPE).; 30th International Ocean and Polar Engineering Conference, ISOPE 2020 ; Conference date: 11-10-2020 Through 16-10-2020",

year = "2020",

language = "English",

series = "Proceedings of the International Offshore and Polar Engineering Conference",

publisher = "International Society of Offshore and Polar Engineers",

pages = "308--316",

booktitle = "30th International Ocean and Polar Engineering Conference",

address = "United States",

}

Mackay, E, Johanning, L, Shi, W & Ning, D 2020, Model tests of a tlp floating offshore wind turbine with a porous outer column. in 30th International Ocean and Polar Engineering Conference. Proceedings of the International Offshore and Polar Engineering Conference, vol. 2020-October, International Society of Offshore and Polar Engineers, pp. 308-316, 30th International Ocean and Polar Engineering Conference, ISOPE 2020, Virtual, Online, 11/10/20.

Model tests of a tlp floating offshore wind turbine with a porous outer column. / Mackay, Ed; Johanning, Lars; Shi, Wei et al.
30th International Ocean and Polar Engineering Conference. International Society of Offshore and Polar Engineers, 2020. p. 308-316 (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2020-October).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings published in a book › peer-review

TY - GEN

T1 - Model tests of a tlp floating offshore wind turbine with a porous outer column

AU - Mackay, Ed

AU - Johanning, Lars

AU - Shi, Wei

AU - Ning, Dezhi

PY - 2020

Y1 - 2020

N2 - This paper presents the results of scaled model tests of a tension leg platform (TLP) for a floating wind turbine, comprising a central solid cylinder with a porous outer cylinder. Tests were conducted with outer cylinders with porosities of 0%, 15% and 30% and compared to a base case with no outer cylinder. For each configuration, the total mass and centre of mass are kept constant to allow consistent comparison. It is shown that for the cases with a solid outer cylinder the surge motion resonance is shifted to a lower frequency due to the entrained mass of water inside and increased added mass of the outer cylinder. Increasing the porosity of the outer cylinder is shown to increase the frequency of the resonant response, bringing the resonant frequency closer to that of the base case with no outer cylinder. Increasing the porosity of the outer cylinder also reduces the amplitude of the resonant response. The use of a porous outer layer increases the quadratic drag on the body and significantly reduces the low frequency resonant response where the radiation damping is low.

AB - This paper presents the results of scaled model tests of a tension leg platform (TLP) for a floating wind turbine, comprising a central solid cylinder with a porous outer cylinder. Tests were conducted with outer cylinders with porosities of 0%, 15% and 30% and compared to a base case with no outer cylinder. For each configuration, the total mass and centre of mass are kept constant to allow consistent comparison. It is shown that for the cases with a solid outer cylinder the surge motion resonance is shifted to a lower frequency due to the entrained mass of water inside and increased added mass of the outer cylinder. Increasing the porosity of the outer cylinder is shown to increase the frequency of the resonant response, bringing the resonant frequency closer to that of the base case with no outer cylinder. Increasing the porosity of the outer cylinder also reduces the amplitude of the resonant response. The use of a porous outer layer increases the quadratic drag on the body and significantly reduces the low frequency resonant response where the radiation damping is low.

KW - Floating Offshore Wind Turbine

KW - Hydrodynamic Response

KW - Motion Damping

KW - Renewable Energy

UR - https://www.scopus.com/pages/publications/85090892808

M3 - Conference proceedings published in a book

AN - SCOPUS:85090892808

T3 - Proceedings of the International Offshore and Polar Engineering Conference

SP - 308

EP - 316

BT - 30th International Ocean and Polar Engineering Conference

PB - International Society of Offshore and Polar Engineers

T2 - 30th International Ocean and Polar Engineering Conference, ISOPE 2020

Y2 - 11 October 2020 through 16 October 2020

ER -

Model tests of a tlp floating offshore wind turbine with a porous outer column

Abstract

Publication series

Conference

UN SDGs

ASJC Scopus subject areas

Keywords

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Cite this